TY - RPRT TI - Distributions of total copper in samples of nonmagnetic heavy-mineral concentrate and of total and partially extractable copper in samples of stream sediment from the Wallace 1 degree x 2 degree Quadrangle, Montana and Idaho AU - D. L. Leach AU - D.M. Hopkins AU - J. A. Domenico AU - H. E. Dawson PY - 1983 DO - 10.3133/ofr83307 UR - https://pubs.usgs.gov/publication/ofr83307 ID - ofr83307 ER -