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Maps showing the distribution of tin, tungsten, arsenic, gold, and silver in nonmagnetic heavy-mineral concentrates derived from stream sediments, Sherbrooke and Lewiston 1⁰?x 2⁰?q...
Published: U.S. Geological Survey ; For sale by Map Distribution, 1990Description: 3 maps on 2 sheets : color ; 89 x 64 cm, sheets 104 x 127 cm and 104 x 137 cm, folded in envelope 30 x 24 cm.Government Document Map