John M. Klein

• Dissolved-solids concentrations and loads in return flows to the Colorado River from agricultural land in southern California
• Distribution of nitrate and related nitrogen species in the unsaturated zone, Redlands and vicinity, San Bernardino County, California
• Distribution of nitrate in the unsaturated zone, Highland-East Highlands area, San Bernardino County, California
• Some chemical effects of the Mount St. Helens eruption on selected streams in the state of Washington