Editore: United States Government Printing Office., 1971
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Condizione: Good. ORIGINAL 1971 PUBLICATION; softcover, missing rear wrap; spine reinforced with tape; o/w in good condition. Book.
Editore: Wash D.C.: United States Government Printing Office, 1954, 1954
8vo.stiff wraps, softcover; 68 pages and six large folded plates in rear pocket; a very good, clean, tight unmarked copy.
Editore: United States Government Printing Office., 1964
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Condizione: Good. ORIGINAL 1964 PUBLICATION; softcover; ex-library; includes six large folded plates in rear pocket (complete); light creasing of corners of wraps and leaves; spine reinforced with tape; o/w in good condition. Book.
Editore: GPO, Washington, D.C., 1964
Da: Hoffman Books, ABAA, IOBA, Columbus, OH, U.S.A.
Softcover. Condizione: Very Good. USGS 1964. Wrappers, very good condition. Complete with all maps and plates.