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<br />REFERENCES CITED
<br />
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<br />appraisal of the Fountain Creek alluvial aquifer between Colorado Springs
<br />and Pueblo, Colorado, including trace elements and organic constituents:
<br />U.S. Geological Survey Water-Resources Investigations Report 86-4085,
<br />45 p.
<br />Chambers, J.M., Cleveland, W.S., Kleiner, Beat, and Tukey, P.A., 1983,
<br />Graphical methods for data analysis: Murray Hill, N.J., Bell Telephone
<br />Laboratories Incorporated, 395 p.
<br />Colorado Department of Health, 1989, Classification and numeric standards--
<br />Arkansas River Basin--3.2.0: Denver, Water Quality Control Commission,
<br />1 volume.
<br />Edelmann, Patrick, 1990, Water quality of Fountain and Monument Creeks,
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<br />stream classifications: U.S. Geological Survey Water-Resources
<br />Investigations Report 88-4132, 99 p.
<br />Edelmann, Patrick, and Cain, Doug, 1985, Sources of water and nitrogen to the
<br />Widefield aquifer, southwestern El Paso County, Colorado: U.S. Geologi-
<br />cal Survey Water-Resources Investigations Report 85-4162, 81 p.
<br />Gilliom, R.J., and Helsel, D.R., 1986, Estimation of distributional parameters
<br />for censored trace level water quality data--1. Estimation techniques:
<br />Water Resources Research, v. 22, no. 2, p. 135-146.
<br />Helsel, D.R., and Cohn, T.A., 1988, Estimation of descriptive statistics for
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<br />Hirsch, R.M., Alexander, R.B., and Smith, R.A., 1991, Selection of methods
<br />for the detection and estimation of trends in water quality: Water
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<br />Hirsch, R.M., Slack, J.R., and Smith, R.A., 1982, Techniques of trend analysis
<br />for monthly water-quality data: Water Resources Research, v. 18, no. 1,
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<br />Hirsch, R.M., and Slack, J.R., 1984, A nonparametric trend test for seasonal
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<br />Kuhn, Gerhard, 1991, Calibration, verification, and use of a steady-state
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<br />Colorado: U.S. Geological Survey Water-Resources Investigations Report
<br />91-4055, 149 p.
<br />SAS Institute Inc., 1985, SAS user's guide:
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<br />U.S. Environmental Protection Agency, 1986, Quality criteria for water 1986:
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<br />von Guerard, Paul, 1989, Suspended sediment and sediment-source areas in the
<br />Fountain Creek drainage basin upstream from Widefield, southeastern
<br />Colorado: U.S. Geological Survey Water-Resources Investigations Report
<br />88-4136, 36 p.
<br />Willingham, W.T., 1976,
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<br />Ammonia toxicity: Denver, U.S. Environmental
<br />EPA-908/3-76-001, 103 p. [Available also from
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