Gold in Placer Deposits Chapter G; Gold Placers and Gold Deposits in the Virginia City-Alder Gulch District, Montana; U.S. Geological Survey Bulletin 1857-G
Washington: United States Government Printing Office, 1989. softcover, 11" x 8.5", 19 pages, illustrated. very good. Item #5568073
ISBN: 0607657960
from the abstract, "Man most likely first obtained gold from placer deposits more than 6,000 years ago. Placers account for more than two-thirds of the total world gold supply, and roughly half of that mined in the States of California, Alaska, Montana, and Idaho."
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