TY - RPRT TI - Quality of surface waters of the United States, 1967, Parts 7 and 8, Lower Mississippi River basin and western Gulf of Mexico basins AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1972 DO - 10.3133/wsp2014 UR - https://pubs.usgs.gov/publication/wsp2014 ID - wsp2014 ER -