11. Facing tomorrow's challenges, an overview Publication/Creation: [Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, [2008] Resource Type: Book Access & Availability: Loading
12. Factor analysis of the chemistry of Spanish moss Author/Creator: Connor, Jon J., author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1984 Resource Type: Book Access & Availability: Loading
13. Factors affecting Escherichia coli concentrations at Lake Erie public bathing beaches Author/Creator: Francy, Donna S., author Publication/Creation: Columbus, Ohio : U.S. Department of the Interior, U.S. Geological Survey, [1998] Resource Type: Book Access & Availability: Loading
14. Factors affecting ground-water exchange and catchment size for Florida lakes in mantled karst terrain Author/Creator: Lee, T. M. (Terrie Mackin) Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading
15. Factors affecting groundwater quality in the Valley and Ridge aquifers, eastern United States, 1993-2002 Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2011 Resource Type: Book Access & Availability: Loading
16. Factors affecting leaching in agricultural areas and an assessment of agricultural chemicals in the ground water of Kansas Author/Creator: Perry, Charles A., author Publication/Creation: Lawrence, Kansas : U.S. Geological Survey, 1988 Resource Type: Book Access & Availability: Loading
17. Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed Author/Creator: Sprague, Lori A., author Publication/Creation: Richmond, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2000 Resource Type: Book Access & Availability: Loading
18. Factors affecting phosphorus transport at a conventionally-farmed site in Lancaster County, Pennsylvania, 1992-95 Author/Creator: Galeone, Daniel G., author Publication/Creation: Lemoyne, Pennsylvania : U.S. Geological Survey, 1996 Resource Type: Book Access & Availability: Loading
19. Factors affecting reservoir and stream-water quality in the Cambridge, Massachusetts, drinking-water source area and implications for source-water protection Author/Creator: Waldron, Marcus C. Publication/Creation: Denver, CO : U.S. Geological Survey, Branch of Information Services [distributor]. Resource Type: Book Access & Availability: Loading
20. Factors affecting spatial and temporal variability in nutrient and pesticide concentrations in the surficial aquifer on the Delmarva Peninsula Author/Creator: Debrewer, Linda M. Publication/Creation: Reston, Va. : U.S. Geological Survey, 2007 Resource Type: Book Access & Availability: Loading