Washington: United States Government Printing Office, 1969. softcover, 11" x 8.5", 17 pages, Plate 1 & 2 folded inside rear pocket, name written on cover. from the title page, "Northwest-trending geochemical anomalies in the surface rocks of the Cripple Creek district are favorable areas for exploration for large low-grade gold..... More
Washington: United States Government Printing Office, 1969. softcover, 11" x 8.5", 17 pages, missing plate 1 but plate 2 folded inside rear pocket, name written top front cover. from the title page, "Northwest-trending geochemical anomalies in the surface rocks of the Cripple Creek district are favorable areas for exploration for..... More
Washington, D.C. USGS, 1992. stapled binding, 11" Tall, cover clean, 27 pages. Encompassing about 21,000 km in southwestern Arizona, the Ajo an Lukeville 1º by 2º quadrangles have been the subject of mineral resource investigations utilizing field and laboratory studies in the disciplines of geology, geochemistry, geophysics, and Landsat imagery..... More