TY - RPRT TI - Studies of Suction Dredge Gold-Placer Mining Operations Along the Fortymile River, Eastern Alaska AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1997 DO - 10.3133/fs15497 UR - https://pubs.usgs.gov/publication/fs15497 ID - fs15497 ER -