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Mineral deposits of Central America, with a section on manganese deposits of Panama
Ralph Jackson Roberts, Earl Montgomery Irving, F. S. Simons
1957, Bulletin 1034
The mineral deposits of Central America were studied between 1942 and 1945, in cooperation with the United States Department of State and the Foreign Economic Administration. Emphasis was originally placed on the study of strategic-mineral deposits, especially of antimony, chromite, manganese, quartz, and mica, but deposits of other minerals that...