Editore: Illinois State Geological Survey Env. Geol. Notes no. 60, 1973, 14 pp., 1973
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condizione: Very Good. ORIGINAL PUBLICATION; Softcovers; ex-library; light creasing of corners of wraps and pages; o/w in good condition.