TY - RPRT TI - Surface water supply of the United States, 1966-70, Part 5, Hudson Bay and upper Mississippi River basins, v. 2, Upper Mississippi River basin above Keokuk, Iowa AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1976 DO - 10.3133/wsp2114 UR - https://pubs.usgs.gov/publication/wsp2114 ID - wsp2114 ER -