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Oregon. Dept. of Fish and Wildlife. Oregon Coast Coho Conservation Plan for the State of Oregon., 2007.
→ digital.osl.state.or.us/islandora/object/osl%3A942595
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. 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.
Umpqua River Basin.. Salem, Or.: Oregon State Water Resources Board, 1958.
→ ir.library.oregonstate.edu/concern/defaults/vm40xw57p
"Umpqua River basin." In State of Oregon Water Use Programs , 33 p. [Salem, Or.], 1978.
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.
→ ir.library.oregonstate.edu/concern/defaults/sx61dr443
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.
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.
→ tinyurl.com/9ur4tzj6
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Pan, Yangdong, Robert M. Hughes, Alan T. Herlihy, and Philip R. Kaufmann. "Non-wadeable river bioassessment: spatial variation of benthic diatom assemblages in Pacific Northwest rivers, USA." Hydrobiologia 684 (2012): p.241-260.
Partnership for the Umpqua Rivers. Fish Viewing Station at Winchester Dam [digital photograph]., 2006.
→ ir.library.oregonstate.edu/concern/defaults/cc08hm511
Partnership for the Umpqua Rivers. Jack Creek Culvert Replacement [digital photograph]., 2006.
→ ir.library.oregonstate.edu/concern/defaults/v405sg59c
Partnership for the Umpqua Rivers. Clover Creek Restoration [digital photograph]., 2006.
→ ir.library.oregonstate.edu/concern/defaults/hh63t2136
Paulsen, Carl G.. Floods of 1950 in southwestern Oregon and northwestern California In Water-Supply Paper (Washington, D.C.). Washington, D.C.: U.S. G.P.O., 1953.
→ pubs.usgs.gov/wsp/1137e/report.pdf
Pearson, H. F.. "The silver horde of the Umpqua. (pt.2)." Umpqua Trapper. 2 (1966): p.12-15.
Pearson, H. F.. "The silver horde of the Umpqua. (pt.1)." Umpqua Trapper. 2 (1966): P.7-10.
Penaluna, Brooke E., and Loretta Ellenburg. "Reoccurrence of the Umpqua chub (Oregonichthys kalawatseti) in the North Umpqua after almost a century." Northwestern Naturalist 100 (2019): p.208-210 .
Peterson, Nancy M.. Biological Characteristics of Wild and Hatchery Steelhead Trout, (Salmo gairdneri) in Two Oregon Rivers. M.S. ed. Corvallis, Or.: Oregon State University, 1978.
→ ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/g732dc261
Pickard, Brian R.. Keying Forest Stream Protection to Aquatic Ecosystem Values in Multi-Owner Watersheds. M.S. ed. Corvallis, Or.: Oregon State University, 2013.
→ ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7h149t13h
Pitney, W. E., and W. O. Saltzman. "Umpqua River." Oregon State Game Commission, Fishery Division. Annual Report - Fishery Division (1956): p.1-18.
→ ir.library.oregonstate.edu/concern/technical_reports/th83m3608
Pitney, W. E., and W. O. Saltzman. "Umpqua River studies." Oregon State Game Commission, Fishery Division. Annual Report - Fishery Division (1955): 1-20.
→ ir.library.oregonstate.edu/concern/technical_reports/bg257f83v
Pitney, W. E., and W. O. Saltzman. "Umpqua River studies." Oregon State Game Commission, Fishery Division. Annual Report - Fishery Division (1954): 1-13.
→ ir.library.oregonstate.edu/concern/technical_reports/cj82kc79z
Pitney, W. E., and W. O. Saltzman. "Umpqua River studies." Oregon State Game Commission, Fishery Division. Annual Report - Fishery Division (1953): p.1-11.
→ ir.library.oregonstate.edu/concern/technical_reports/j3860c16k
Pitney, W. E.. "Umpqua River investigations." Oregon State Game Commission, Fishery Division. Annual Report - Fishery Division (1950): p.6-17.
→ ir.library.oregonstate.edu/concern/technical_reports/v118rj88c
Powell, Mark A.. Water-quality concerns in restoration of stream habitat in the Umpqua Basin In Sea-Run Cutthroat Trout Biology, Management, and Future Conservation Proceedings of a Symposium, Edited by J. D. Hall, P. A. Bisson and R. E. Gresswell. Reedsport, Oregon: Oregon Chapter of the American Fisheries Society, 1995.

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