Editore: Bureau of Economic Geology, 1981, 6 pp. explanation + 32 cross sections., 1981
Da: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. ORIGINAL PUBLICATION; Softcovers explanation and cross-sections in printed folder; ex-library; minor shelfwear w/ light creasing of edges of folder; a couple of small tears in edges of folder; small creases at corners of a couple of folded sections; o/w in very good condition.