Tweto, Ogden, Steven, T. A., Hail, Jr., W.J., and Moench, r. H.

Preliminary Geologic Map of the Montrose 1º x 2º Quadrangle, Southwestern Colorado; Miscellaneous Field Studies Map MF-761

U.S. Geological Survey, 1976. tan envelope, 1 foldout. very good. Item #5565633

map scale 1:250,000 DM4.

Price: $25.00