TY - RPRT TI - Supplemental chemical analyses of surface waters in the Tongue River basin, Montana, September 1948 to September 1949 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1951 DO - 10.3133/ofr51160 UR - https://pubs.usgs.gov/publication/ofr51160 ID - ofr51160 ER -