TY - RPRT TI - Surface water supply of the United States, 1919-1920, Part VII, Lower Mississippi River basin AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1922 DO - 10.3133/wsp507 UR - https://pubs.usgs.gov/publication/wsp507 ID - wsp507 ER -