Mineral resources of the Kofa Unit 4 North Wilderness Study Area, Yuma County, Arizona / by David R. Sherrod ... [et al.] (U.S. Geological Survey bulletin ; 1702-K) (Mineral resources of wilderness study areas--southwestern and south-central Arizona ; ch. K)
Mineral resources of the Kofa Unit 4 North Wilderness Study Area, Yuma County, Arizona / by David R. Sherrod ... [et al.]
(U.S. Geological Survey bulletin ; 1702-K) (Mineral resources of wilderness study areas--southwestern and south-central Arizona ; ch. K)