TY - RPRT TI - Water-resources activities of the U.S. Geological Survey in Montana, October 1991 through September 1993 AU - K. S. Midtlyng AU - C.J. Harksen PY - 1993 DO - 10.3133/ofr93151 UR - https://pubs.usgs.gov/publication/ofr93151 ID - ofr93151 ER -