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1914
Van Winkle, Walton. Umpqua River In Water-supply paper / Department of the Interior, United States Geological Survey. Vol. no.363. Quality of the Surface Waters of Oregon no.363. Washington, D.C., 1914.
→ archive.org/download/qualityofsurface00vanw/qualityofsurface00vanw_bw.pdf
1969
Curtiss, D. A.. Chemical quality of surface water in the Umpqua River Basin, Oregon In Open-File Report / U.S. Geological Survey. Portland, Or.: U.S. Geological Survey, 1969.
→ pubs.usgs.gov/of/1969/0067/report.pdf
1974
Specht, David T., and U.S. National Science Foundation. Energy-Related General Research Office. The use of standardized marine algal bioassays for nutrient assessment of Oregon coastal estuaries In The Proceedings of the Fourth Annual Technical Conference March 14-15, 1974 on Estuaries of the Pacific Northwest. Vol. Circular - Engineering Experiment Station, Oregon State University, Corvallis ; no. 50 . Corvallis, Or.: Oregon State University, Engineering Experiment Station, 1974.
→ ir.library.oregonstate.edu/concern/defaults/q811kk38w
1975
Claeys, Robert R., Richard S. Caldwell, Norman H. Cutshall, and Robert Holton. "Chlorinated pesticides and polychlorinated biphenyls in marine species, Oregon/Washington coast, 1972." Pesticides Monitoring Journal 9 (1975): p.2-9.
1983
Caldwell, Richard S., and Donald R. Buhler. "Heavy metals in estuarine shellfish from Oregon." Archives of Environmental Contamination and Toxicology 12 (1983): p.15-23.
1984
Curtiss, D. A., C. A. Collins, and E. A. Oster. Water-resources of western Douglas County, Oregon In Water-Resources Investigations Report. Vol. no.83-4017 ., 1984.
→ pubs.er.usgs.gov/publication/wri834017