USGS B 520
Placer mining in the Fortymile, Eagle, and Seventymile River districts
Publisher:U.S. Geological Survey
USGS Publications Warehouse
Porter, E.A., 1912, Placer mining in the Fortymile, Eagle, and Seventymile River districts, in U.S. Geological Survey, Mineral resources of Alaska, report on progress of investigations of 1911: U.S. Geological Survey Bulletin 520, p. 211-218.
- This publication is part of a larger work. Please see B 520 for more information.
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