TY - RPRT TI - Index of surface-water records, part 7, Lower Mississippi River basin, to September 30, 1950 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1951 DO - 10.3133/cir144 UR - https://pubs.usgs.gov/publication/cir144 ID - cir144 ER -