Publicado por Conreso Geologico Internacional, 1956, 87 pp. + 2 folded maps., 1956
Librería: Eryops Books, Stephenville, TX, Estados Unidos de America
Soft cover. Softcovers; ex-corporate library; minor shelfwear w/ light creasing of edges of wraps and corners of leaves; o/w in very good condition.
Publicado por XX Congreso Geologico Internacional, 1956, iv + 87 pp. + 2 folded plates in rear pocket., 1956
Librería: Eryops Books, Stephenville, TX, Estados Unidos de America
Soft cover. Softcovers; ex-library; minor shelfwear w/ light creasing of edges of wraps; light soiling of wraps; small creases at corners of leaves; o/w in good condition.
Publicado por Universidad Nacional Autonoma De Mexico, Instituto De Geologia, 1965, 77 Pp. + Folded Map in Rear Pocket., 1965
Librería: Eryops Books, Stephenville, TX, Estados Unidos de America
Soft Cover. Condición: Good. Softcovers; minor shelfwear; light stain along spine and very light stain on upper edge of a few leaves; o/w in good condition.