The Bureau of Mines Minerals Availability System: An Update of Information Circular 8654

Report issued by the U.S. Bureau of Mines discussing the Minerals Availability System (MAS). As stated in the mission, "the mission of the Minerals Availability System is to provide current appraisals of the engineering and economic availability of non-fuel minerals for consideration in the formulation of both domestic and foreign minerals policy" (p. 3). This report includes maps, tables, and illustrations.