Burchett, R. R., Eversoll, D. A., 1974. Inventory of Mining Operations in Nebraska (RR-7): 272 pp., size 8.5" x 11". Description: This report presents an inventory, as of January 1, 1974, of the Nebraska producers of limestone, sand, gravel, and silt; clay and shale; sandstone; quartzite; volcanic ash; flint; and coal. Its main purpose was to assist persons needing information on mining operations in Nebraska, on uses made of the mined materials, and on efforts to reclaim mined areas for beneficial use. Similar inventories were made for 1968 and 1971, entitled "Directory of Quarries, Pits and Mines."