TY  - RPRT
TI  - Quality of surface waters of the United States, 1970, Part 7, Lower Mississippi River basin
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1975
DO  - 10.3133/wsp2156
UR  - https://pubs.usgs.gov/publication/wsp2156
ID  - wsp2156
ER  -