Editore: GSA Spec. Pap. 120, 1969, 109 pages., 1969
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condizione: Good. Softcovers, ex-library, minor edgewear, o/w in good condition.
Editore: GSA Special Paper 120, 1969, 109 pp., 1969
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condizione: Very Good. Softcovers; in very good condition.
Editore: Geological Society of America, New York, 1969
Da: Robert Gavora, Fine & Rare Books, ABAA, Talent, OR, U.S.A.
Soft cover. Condizione: Fine. 109 pages with maps, photomicrographs, tables, graphs, references and index. Bound in original white and gray thick paper covers lettered in black. A fine and bright copy which appears as new. Book.