Published by Kansas Geological Society, 1957, 126 pp., 1957
Seller: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condition: Good. ORIGINAL PUBLICATION; Softcovers; ex-corporate library; light creasing of corners of wraps and leaves; a couple of small nicks on fore-edge of front wrap; o/w in very good condition.