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2006
Tanner, Dwight Q., Douglas County(Or.), USGS Oregon Water Science Center, and Geological Survey(U.S.). Water quality and algal data for the North Umpqua River basin, Oregon, 2005 In Data Series (Geological Survey (U.S.)). Reston, VA: U.S. Geological Survey, 2006.
→ pubs.usgs.gov/ds/2006/229/