Published by USGS Bulletin 1403, 1977, xi + 151 pp. + 2 folded maps in rear pocket., 1977
Seller: Eryops Books, Stephenville, TX, U.S.A.
Soft cover. Condition: UNSPECIFIED. Softcovers; ex-library; minor shelfwear w/ light creasing of corners of wraps and pages; o/w in very good condition.