TY - RPRT TI - Water resources data for Minnesota, water year 1981; Volume 2, Upper Mississippi and Missouri River basins AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1982 DO - 10.3133/wdrmn812 UR - https://pubs.usgs.gov/publication/wdrMN812 ID - wdrMN812 ER -