1. Seasonal changes in phytoplankton populations and related chemical and physical characteristics in lakes in Loch Vale, Rocky Mountain National Park, Colorado Author/Creator: McKnight, Diane M., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
2. Sediment discharge in the Colorado River near De Beque, Colorado Author/Creator: Butler, David L. 1946- (David Louis), author Publication/Creation: Lakewood, Colorado : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
3. Sediment-data sources and estimated annual suspended-sediment loads of rivers and streams in Colorado Author/Creator: Elliott, John G. 1951- (John Grant), author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
4. Selenium concentrations in leaf material from Astragalus Oxyphysus (diablo locoweed) and Atriplex Lentiformis (quail bush) in the interior Coast Ranges and the western San Joaquin Valley, California Author/Creator: Izbicki, John A., author Publication/Creation: Sacramento, California : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
5. Shallow ground-water conditions, Tom Green County, Texas Author/Creator: Lee, James N., author Publication/Creation: Austin, Texas : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
6. Shallow ground-water flow, water levels, and quality of water, 1980-84, Cowles Unit, Indiana Dunes National Lakeshore Author/Creator: Cohen, David A., author Publication/Creation: Indianapolis, Indiana : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
7. Simulation of ground-water flow in the Rio Yauco alluvial valley, Yauco, Puerto Rico Author/Creator: Quiñones-Aponte, Vicente, author Publication/Creation: San Juan, Puerto Rico : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading
8. Simulation of the effects of management alternatives on the stream-aquifer system, South Fork Solomon River Valley between Webster Reservoir and Waconda Lake, north-central Kansas Author/Creator: Burnett, Robert D., author Publication/Creation: Lawrence, Kansas : U.S. Geological Survey, 1985 Resource Type: Book Access & Availability: Loading
9. Sources of water and nitrogen to the Widefield Aquifer, southwestern El Paso County, Colorado Author/Creator: Edelmann, Patrick, author Publication/Creation: Lakewood, Colorado : U.S. Geological Survey, 1985 Resource Type: Book Access & Availability: Loading
10. Statistical analyses of flood frequency, low-flow frequency, and flow duration of streams in the Philadelphia area, Pennsylvania Author/Creator: Voytik, Andrew, author Publication/Creation: Harrisburg, Pennsylvania : U.S. Geological Survey, 1986 Resource Type: Book Access & Availability: Loading