TY  - RPRT
TI  - Quality of surface waters of the United States, 1949 : Parts 1 -6
AU  - C. G. Paulsen
PY  - 1953
DO  - 10.3133/wsp1162
UR  - https://pubs.usgs.gov/publication/wsp1162
ID  - wsp1162
ER  -