1. Leasable mineral and waterpower land classification map of the Sterling 1° x 2° quadrangle, Colorado, Nebraska, and Kansas lands withdrawn, classified and prospectively valuable for leasable minerals ; occurrences of other selected minerals ; and lands withdrawn or classified for waterpower and reservoir sites / [cartographic material] Yale Public content 1980. 2015-02-27T18:55:24Z. 2015-03-10T22:10:28Z. Allen, Elizabeth G. U.S. Geological Survey. English. Public. Colorado, Nebraska, and Kansas.