United States Bureau of Mines Information Circular 8206

Report issued by the U.S. Bureau of Mines discussing the marketing of ores and mineral concentrates. As stated in the introduction, "the primary purpose of this report is to present data that will be useful to the producer of gold, silver, copper, lead, and zinc ores and concentrates in determining if a choice or ore markets is available and, if so, in choosing which marketing combination is likely to give a maximum return on ore shipments" (p. 2). This report includes maps, tables, and illustrations