Daphne G. Clifton

• Sources and concentrations of dissolved solids and selenium in the San Joaquin River and its tributaries, California, October 1985 to March 1987
• Analysis of biological data collected in the Bull Run Watershed, Portland, Oregon, 1978 to 1983
• Trace elements in bed sediments of the San Joaquin River and its tributary streams, California, 1985
• Water-quality data for Smith and Bybee Lakes, Portland, Oregon