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O’Neill, Brian, and Debra Barner. "A good place to camp is a good place to camp: nine thousand years at the Williams Creek site on the North Umpqua River." Journal of Northwest Anthropology 45, no. 2 (2011): p.149-158.
O’Connor, Jim E., Joseph F. Mangano, Daniel R. Wise, and Joshua R. Roering. "Eroding Cascadia—Sediment and solute transport and landscape denudation in western Oregon and northwestern California." Geological Society of America Bulletin 133 (2021): p.1851-1874.
Oster, E. A.. Flood Profiles in the Umpqua River Basin, Oregon In Open-file report (Geological Survey (U.S.)). Vol. pts.1-3. Portland, Or: Unite States Department of the Interior, Geological Survey, Water Resources Division, Oregon District,, 1972.
"Umpqua River basin." In State of Oregon Water Use Programs , 33 p. [Salem, Or.], 1978.
Umpqua River Basin.. Salem, Or.: Oregon State Water Resources Board, 1958.
Oregon. State Engineer, and United States. Geological Survey. Water resources of the State of Oregon: Summary of available Iiformation: 1937-1941 In Bulletin / Oregon State Engineer. Vol. no.10. Salem, Or.: Oregon. Office of the State Engineer,, 1946.
Oregon. State Engineer, and United States. Geological Survey. Water Resources of the State of Oregon : Summary of Available Information: 1931-1936 In Bulletin (Oregon. State Engineer) . Vol. no.9. Salem, Or.: Office of State Engineer, 1937.
Oregon. State Engineer, and U.S. Geological Survey. Water resources of the state of Oregon: summary of available information 1914-1924 : Umpqua, Coquille In Bulletin / Oregon State Engineer. Salem, Or.: State Printing Dept., 1925.
Oregon. Dept. of Fish and Wildlife. Umpqua River spring Chinook In Hatchery and Genetic Management Plan . [Salem, Or.?]: Oregon Dept. of Fish and Wildlife, 2006.
Oregon. Dept. of Fish and Wildlife. Oregon Coast Coho Conservation Plan for the State of Oregon., 2007.
Oregon. Dept. of Fish and Wildlife. Umpqua River spring Chinook In Hatchery and Genetic Management Plan. [Salem, Or.?]: Oregon Dept. of Fish and Wildlife, 2016.
Oregon. Dept. of Environmental Quality. Laboratory and Environmental Assessment Division. Oregon Water Quality Index Summary Report: Water Years 2011-2020. Hillsboro, Or.: Oregon Dept. of Environmental Quality, 2021.
Oregon. Dept. of Environmental Quality Western Region. Little River Watershed TMDL. Appendix A : Little River Stream Temperature Model. [Portland, Or.]: Oregon Department of Environmental Quality, 2001.
Oregon. Dept. of Environmental Quality. Little River Watershed TMDL. Appendix B : Little River pH Model. [Portland, Or.]: Oregon Dept. of Environmental Quality, 2001.
Oregon State University. College of Agricultural Sciences. Sutherlin Creek Watershed Project, 1968-1969 In Oregon State University Archives College of Agricultural Sciences collection (RG 158), box 4/1/3/10., 1968.
Oregon Secretary of State.,. Umpqua River Water and Fish Bill In Oregon. Office of the Secretary of State. Voters pamphlet. Salem, Or., 1928.
Oregon Department of Fish and Wildlife. Oregon Coast Coho Conservation Plan Annual Report. [Salem, Or.]: [Oregon Dept. of Fish and Wildlife], 2017.
Oregon Department of Fish and Wildlife. Oregon Coast Coho Conservation Plan Annual Report. [Salem, Or.]: [Oregon Dept. of Fish and Wildlife], 2016.
Oregon Department of Fish and Wildlife. Oregon Coast Coho Conservation Plan Annual Report. [Salem, Or.]: [Oregon Dept. of Fish and Wildlife], 2014.
Oregon Department of Fish and Wildlife. Oregon Coast Coho Conservation Plan 2019 Annual Report. [Salem, Or.]: [Oregon Dept. of Fish and Wildlife], 2019.
Onions, Charles A.. Sediment Transport in Streams in the Umpqua River Basin, Oregon. Portland, Or.: U.S. Geological Survey, 1969.
O'Neill, Brian L., and Donald K. Scheleen. "An assemblage of stemless projectile points from Rock Creek: results of the 1936 Stafford and Voget Expedition to the North Umpqua River." In Contributions to the archaeology of Oregon, 1995-1997, edited by Albert C. Oetting, p.105-122. Vol. no.6. Occasional Papers / Association of Oregon Archaeologists no.6. Eugene, Or.: Association of Oregon Archaeologists, 1997.
O'Connor, Jim E., Rose J. Wallick, Steven Sobieszczyk, Charles Cannon, and Scott W. Anderson. Preliminary assessment of vertical stability and gravel transport along the Umpqua River, southwestern Oregon In U.S. Geological Survey Open-File Report. Vol. no.2009-1010. Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey,, 2009.

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