Editore: Oklahoma Bureau of Geology Circ. 3, 1924, 23 pp. + folded map., 1924
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condizione: Good. ORIGINAL PUBLICATION; Softcovers; ex-library; spine reinforced w/ tape; text separated from wraps; front wraps with glue stain due to library card; minor shelfwear and light soiling of wraps; o/w in good condition.