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22. The computer model SHARP, a quasi-three-dimensional finite-difference model to simulate freshwater and saltwater flow in layered coastal aquifer systems
23. Computerized stratified random site-selection approaches for design of a ground-water-quality sampling network
24. External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1988
25. Considerations related to drilling methods in planning and performing borehole-geophysical logging for ground-water studies
26. Programs and analytical methods for the U.S. Geological Survey acid rain quality-assurance project
27. A steady-state unsaturated-zone model to simulate pesticide transport
28. Summary of the National Atmospheric Deposition Program/National Trends Network intersite-comparison program, November 1978-November 1989
29. Comparison of conventional onsite recorders and satellite telemetry for surface-water data collection by the U.S. Geological Survey
30. U.S. Geological Survey Toxic Substances Hydrology Program : proceedings of the technical meeting, Monterey, California, March 11-15, 1991
31. Variability in wet atmospheric deposition data determined with collocated samplers
32. Laboratory procedures and data reduction techniques to determine rheologic properties of mass flows
33. Quality-assurance data for routine water analysis in the laboratories of the U.S. Geological Survey for water year 1990
34. Method to identify wells that yield water that will be replaced by Colorado River water in Arizona, California, Nevada, and Utah
35. External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1991
36. Nutrients in ground water and surface water of the United States--an analysis of data through 1992
37. Evaluation of Acoustic Doppler Current Profiler measurements of river discharge
38. Evaluation of selected information on splitting devices for water samples
39. External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network during 1994
40. Guidelines and standard procedures for studies of ground-water quality : selection and installation of wells, and supporting documentation
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