<br />SELECTED REFERENCES
<br />
<br />Abbott, P.O., 1985, Description of water-systems operations
<br />in the Arkansas River basin, Colorado: U.S. Geolog-
<br />ical Survey Water-Resources Investigations Reporr
<br />85-4092,67 p.
<br />Bohmon!, B.L., 1991, Colorado pesticide use survey,
<br />estimated use, 1989: Forr Collins, Colorado State
<br />University, 43 p.
<br />Britton, L.J. and Greeson, P.E., eds., 1987, Methods for
<br />collection and analysis of aquatic biological and
<br />microbiological samples: U.S. Geological Survey
<br />Techniques of Water-Resources Investigations, book 5,
<br />chap. A4, 363 p.
<br />Brown, T.H., 1991, Solubility, sorption, and redox relation-
<br />ships for selenium in reclaimed environments, in
<br />Proceedings of the 1990 Billings Land Reclamation
<br />Symposium on Selenium in Arid and Semiarid
<br />Environments, Western United States; U.S. Geological
<br />Survey Circular 1064, p. 25--33.
<br />Burns, A W., 1985, Selected hydrographs and statistical
<br />analyses cbaracterizing the water resources of the
<br />Arkansas River basin, Colorado: U.S. Geological
<br />Survey Water-Resources Investigations Reporr
<br />85-4264, 199 p.
<br />Cain, Doug, 1985, Quality of the Arkansas River and
<br />irrigation-return flows in the lower Arkansas River
<br />valley, Colorado: U.S. Geological Survey Water-
<br />Resources Investigations Reporr 84-4273, 85 p.
<br />Clark, M.L., and Lewis, M.E., 1997, Metal speciation
<br />in the upper Arkansas River, Colorado, 1990-93:
<br />U.S. Geological Survey Water-Resources Investiga-
<br />tions Reporr 96-4282, 24 p.
<br />Clements, w.H., 1991, Fate and effects ofbeavy metals on
<br />the Arkansas River. Colorado Water Resources
<br />Research Institute Completion Reporr No. 163, 24 p.
<br />Colorado Department of Agriculture, 1981, Colorado agri-
<br />culture statistics: Denver, Colorado Department of
<br />Agriculture, 162 p.
<br />Colorado Department of Health, 1994, Classifications and
<br />numeric standards Arkansas River Basin: Denver,
<br />Colorado Department of Health, 78 p.
<br />Crouch, T.M., Cain, Doug, Abbott, P.O., Penley, R.D., and
<br />Hurr, R. T., 1984, Water-resources appraisal of the
<br />upper Arkansas River Basin from Leadville to Pueblo,
<br />Colorado; U.S. Geological Survey Water-Resources
<br />Investigations Reporr 82--4114, 123 p.
<br />Dash, Russell, and Orriz, Roderick F., 1996, Water-quality
<br />data for the Arkansas River Basin, southeastern Colo-
<br />rado, 1990-93: U.S. Geological Survey Open-File
<br />Reporr 95-464, 137 p.
<br />Fenneman, N.M., 1931, Physiography of the Western
<br />United States; New York, McGraw-Hili, 534 p.
<br />
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<br />
<br />Gerhardt, A., 1993, Review of impact of heavy metals On
<br />stream invertebrates with special emphasis on acid
<br />conditions; Water, Air, and Soil Pollution, v. 66,
<br />p.289-314.
<br />Hatten, H.J., 1969, Selenium in the Upper Cretaceous
<br />Niobrara Formation and Pierre Shale of south-central
<br />Colorado, in Abstracts for 1968 [abs.]: Geological
<br />Society of America Special Paper 121, p. 606.
<br />Hem, J.D., 1985, Study and interpretation of the chemical
<br />characteristics of natural water: U.S. Geological
<br />Survey Water-Supply Paper 2254, 263 p.
<br />Kimball, Briant A., Callender, Edward, and Axtmann,
<br />Ellen Y, 1995, Effects of colloids on metal transporr in
<br />a river receiving acid mine drainage, upper Arkansas
<br />River, Colorado, U.S.A.: Applied Geochemistry, v. 10,
<br />p. 282-306.
<br />Lewis, M.E., and Edelmann, P.E, 1994, Physical, chemical,
<br />and biological characteristics of Pueblo Reservoir,
<br />Colorado, 1985-89: U.S. Geological Survey Water-
<br />Resources Investigations Reporr 94-4097, 71 p.
<br />Miles, D.L., 1977, Salinity in the Arkansas Valley ofColo-
<br />rado: U.S Environmental Protection Agency and
<br />Colorado State University, Interagency Agreement,
<br />EPA-1AG-D4-0544, 80 p.
<br />Moore, J.w., and Ramamoonhy, S., 1984, Heavy metals in
<br />natural waters: New York, Springer-Verlag, 268 p.
<br />Moran, R.E., and Wentz, D.A, 1974, Elfectofmetal-mine
<br />drainage on water quality in selected areas of Colorado
<br />1972-73; Colorado Water Conservation Board,
<br />Water-Resources Circular 25, 250 p.
<br />Mueller, D.K., DeWeese, L.R., Garner, A.J., and
<br />Spruill, T.B., 199], Reconnaissance investigation of
<br />water quality, bottom sediment, and biota associated
<br />with irrigation drainage in the middle Arkansas River
<br />Basin, Colorado and Kansas, 1988-89; U.S. Geolog-
<br />ical Survey Water-Resources Investigations Reporr
<br />91--4060,84 p.
<br />National Technical Advisory Committee to the Secretary of
<br />the Interior: 1968. Water quality criteria: U.S. Govern-
<br />ment Printing Office, Washington, D.C., 232 p.
<br />Oremland, R.S., Hollibaugh, J.T., Maest, AS., Presser, T.S.,
<br />Miller, L.G., and Culberrson, c.w., 1989, Selenate
<br />reduction to elemental selenium by anaerobic bacteria
<br />in sediments and culture-Biogeochemical signifi-
<br />cance of a novel, sulfate-independent respiration:
<br />Applied and Environmental Microbiology, v. 55, no. 9,
<br />p. 2333-2343.
<br />Pettijohn, F.J., ]949, Sedimentary rocks: New York, Harper
<br />& Brothers Publishers. 526 p.
<br />SAS Institute, Inc., 1985, SAS user's guide-Statistics
<br />(5th ed.); Cary, N.C., SAS Institute, 956 p.
<br />
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