Edité par Geol. Surv. Can. Pap. 74-61, 1974, 12 pages + sections, etc. in pocket., 1974
Vendeur : Eryops Books, Stephenville, TX, Etats-Unis
Soft Cover. Etat : Very Good. Ex-library, softcovers, minor shelfwear; o/w in very good condition.
Edité par Geological Survey of Canada, Ottawa, ON, Canada, 1974
Vendeur : Post Horizon Booksellers, Moose Jaw, SK, Canada
Booklet. Etat : Near Fine. Geological Survey Paper 74-61. 12pp w bibliography and appendices. Indexed fold-out figure laid in. Card wrap without wear, stapled binding sound.