Keystone (Plus de 9 600 résultats)

Paperback. Etat : Good.

Paperback. Etat : Good.

Hardback. Etat : Good. Welcome to Pennsylvania, the Keystone State Students will explore the Appalachian Mountains, attend a Philadelphia Eagles football game, discover history at Valley Forge National Historical Park, and more as they learn about Pennsylvania's history, plants and animals, industries, sports, cities, famous people, and more in this fun, fact-filled title. Aligned to Common Core Standards and correlated to state standards. Abdo & Daughters is an imprint of Abdo Publishing, a division of ABDO. …

Paperback. Etat : Very Good.

Paperback. Etat : Very Good.

paperback. Etat : Fair.

Etat : very_good. Book is in very good condition and may include minimal underlining highlighting. The book can also include "From the library of" labels. May not contain miscellaneous items toys, dvds, etc. . We offer 100% money back guarantee and 24 7 customer service.

Etat : very_good. Book is in very good condition and may include minimal underlining highlighting. The book can also include "From the library of" labels. May not contain miscellaneous items toys, dvds, etc. . We offer 100% money back guarantee and 24 7 customer service.

Etat : very_good. Book is in very good condition and may include minimal underlining highlighting. The book can also include "From the library of" labels. May not contain miscellaneous items toys, dvds, etc. . We offer 100% money back guarantee and 24 7 customer service.

Etat : good. Book is in good condition and may include underlining highlighting and minimal wear. The book can also include "From the library of" labels. May not contain miscellaneous items toys, dvds, etc. . We offer 100% money back guarantee and 24 7 customer service.

Paperback. Etat : Acceptable. Illustrated. The cover shows normal wear. Fast shipping and order satisfaction guaranteed. A portion of your purchase benefits Non-Profit Organizations, First Aid and Fire Stations.

Hardback. Etat : Good. Scientist and author Cristina Eisenberg presents a fascinating and wide-ranging look at the dramatic ecological consequences of predator removal (and return) as she explores the concept of 'trophic cascades' and the role of top predators in regulating ecosystems. She shows how and why animals such as wolves, sea otters, and sharks exert such a disproportionate influence on their environment, and considers how this notion can help provide practical solutions for restoring ecosystem health and functioning. Eisenberg examines both general concepts and specific issues, sharing accounts from her own fieldwork to illustrate and bring to life the ideas she presents. She considers how resource managers can use knowledge about trophic cascades to guide recovery efforts, including how this science can be applied to move forward the bold vision of rewilding the North American continent. In the end, the author provides her own recommendations for local and landscape-scale applications of what has been learned about interactive food webs. At their most fundamental level, trophic cascades are powerful stories about ecosystem processes - of predators and their prey, of what it takes to survive in a landscape, of the flow of nutrients. "The Wolf's Tooth" is the first book to focus on the vital connection between trophic cascades and restoring biodiversity and habitats, and to do so in a way that is accessible to a diverse readership.…

hardcover. Etat : Fair.

Paperback. Etat : As New.

Paperback. Etat : Fair. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way.

Hardback. Etat : Very Good. Many companies operate within a complex network of firms that all depend on each other for success. This book uses the example of biological ecosystems to show how companies can leverage these emerging business networks for long-term success. It says that companies can protect and ensure their success by fostering the health of network.…

Etat : good. Gently used with minimal wear on the corners and cover. A few pages may contain light highlighting or writing, but the text remains fully legible. Dust jacket may be missing, and supplemental materials like CDs or codes may not be included. May be ex-library with library markings. Ships promptly.…

Paperback. Etat : Good. Exposes a self-serving game, typically played by congressmen to curry favor with constituents, that involves the creation and subsequent dissolution of government service agencies.

Paperback. Etat : Fair. Revised. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way.

Paperback. Etat : Fair. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way.

Paperback. Etat : Fair. 1. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way.

Hardcover. Etat : Very Good. 1. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting. Parry, Jo (illustrateur).

Paperback. Etat : Fair. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way. Albergottie, Aziza (illustrateur).

Paperback. Etat : Very Good. 2. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting.

Paperback. Etat : Very Good. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting. Albergottie, Aziza (illustrateur).

Etat : very_good. This book is in excellent condition. There may be minimal writing on the inside cover or cover page. Cover image on the book may vary from photo. Ships out quickly in a secure plastic mailer.

Etat : good. This book is in good condition with very minimal damage. Pages may have minimal notes or highlighting. Cover image on the book may vary from photo. Ships out quickly in a secure plastic mailer.

Etat : good. This book is in good condition with very minimal damage. Pages may have minimal notes or highlighting. Cover image on the book may vary from photo. Ships out quickly in a secure plastic mailer.

Paperback. Etat : Very Good. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting.

Paperback. Etat : Fair. Illustrated. The item might be beaten up but readable. May contain markings or highlighting, as well as stains, bent corners, or any other major defect, but the text is not obscured in any way.