Edité par USGS Bulletins 1787-H, I, 1989, 21 pp. + plate in pocket., 1989
Vendeur : Eryops Books, Stephenville, TX, Etats-Unis
Soft Cover. Etat : Very Good. ORIGINAL PUBLICATION; Softcovers; ex-library; in very good condition.
Edité par USGS Bull. 1787, 1989, 10 pp. + 11 pp. + folded plate in pocket., 1989
Vendeur : Eryops Books, Stephenville, TX, Etats-Unis
Soft Cover. Etat : Very Good. ORIGINAL PUBLICATION; Softcovers; ex-library; in very good condition.