Burchett, R. R. and Eversoll, D.A., 1994. Directory of Nebraska Quarries, Pits, and Mines (RR-13): 135 pp., size 8.5" x 11". Description: This resource report is a revised (as of 1971) directory of the known producers of stone, sand and gravel, clay and shale, and volcanic ash in Nebraska. It was prepared to assist those interested in production and utilization the rock and mineral resources of the state. Out of print, unbound copy available.