L. P. Gough R. B. Wanty W. C. Day Bronwen Wang B. M. Gamble M. Henning Z. A. Brown A. L. Meier J.G. Crock 1999 application/pdf 10.3133/ofr9933 en U.S. Geological Survey : Books and Open-File Reports [distributor], Regional geochemical results from the analyses of rock, water, soil, stream sediment and vegetation samples; Fortymile River watershed, East-Central Alaska reports