@article {24636,
	title = {Water-resources of western Douglas County, Oregon},
	volume = {no.83-4017 },
	year = {1984},
	note = {Summerizes lower Umpqua River resources -- groundwater, surface water, aquifer, extent of saltwater intrusion, water chemistry. Map extends a bit past Kellogg.},
	pages = {81 p. + map},
	keywords = {chemical, geology, hydrology, sediments, Smith River, Umpqua River, water quality},
	url = {https://pubs.er.usgs.gov/publication/wri834017},
	author = {Curtiss, D.A. and Collins, C.A. and Oster, E. A.}
}
@book {23741,
	title = {Chemical quality of surface water in the Umpqua River Basin, Oregon},
	series = {Open-File Report / U.S. Geological Survey},
	number = {69-67},
	year = {1969},
	note = {"In July 1967, the U.S. Geological Survey, in cooperation with Douglas County, began a 2-year study of the chemical quality of surface water in the Umpqua River basin. The purpose of this report is to present an interpretive summary of the data collected . . ." (from the Introduction. The study analyzed water quality, location and seasonal differences, causes of differences, and chemical constituents that might affect the usability of the water.},
	month = {1969},
	pages = {25 p.},
	publisher = {U.S. Geological Survey},
	organization = {U.S. Geological Survey},
	address = {Portland, Or.},
	keywords = {chemical, heavy minerals, nitrate-nitrite, pesticides, Trace metals, Umpqua River Basin, water pollution, water quality},
	url = {https://pubs.usgs.gov/of/1969/0067/report.pdf},
	author = {Curtiss, D.A.}
}
