Editore: U. S. Department of the Interior, Washington, D. C., 1985
Da: Willis Monie-Books, ABAA, Cooperstown, NY, U.S.A.
softcover. Condizione: Very Good. Condizione sovraccoperta: No Dust Jacket. Bureau of Mines Information Circular 8990 & 8991. Two booklets: 1. Field Investigations and Descriptions of Chromite Deposits 2. Mineralogy and Results of Beneficiation Tests.