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Filters: Author is Collins, C.A. and Keyword is Umpqua River  [Clear All Filters]
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
1976
Robison, J. H., and C. A. Collins. Availability and quality of ground water in the Drain-Yoncalla area, Douglas County, Oregon [cartographic material] In Water Resources Investigations. Vol. Portland, Or.: U.S. Geological Survey, Water Resources Division, 1976.
→ pubs.er.usgs.gov/publication/wri76105