Published by USGS Bulletin 1133-G, 1965, 42 pp. + 2 maps/sections in pocket., 1965
Seller: Eryops Books, Stephenville, TX, U.S.A.
Soft Cover. Condition: Good. ORIGINAL PUBLICATION; Softcovers; ex-library; minor shelfwear w/ lightly bumped corners and a few nicks along edges of wraps; fore-edge and top edge of front wraps rubbed; o/w in good condition.