The quality of our nation's waters: Nutrients and pesticides

Ground-Water Data-Collection Protocols and Procedures for the National Water-Quality Assessment Program: Collection and Documentation of Water-Quality Samples and Related Data

Michael T. Koterba, Franceska D. Wilde, Wayne W. Lapham · Antarctica A Keystone in a Changing World · 1995 · 432 citations

Natural Resources, Earth Sciences, Water Quality Engineering +12

Field guide for collecting and processing stream-water samples for the National Water-Quality Assessment Program

L.R. Shelton · Antarctica A Keystone in a Changing World · 1994 · 403 citations · Full text

Natural Sciences, Environmental Sciences, Hydrology +17

Design of the National Water-Quality Assessment Program; occurrence and distribution of water-quality conditions

Robert J. Gilliom, William M. Alley, Martin E. Gurtz · U.S. Geological Survey circular/U.S. Geological Survey Circular · 1995 · 360 citations · Full text

Natural Resources, Environmental Sciences, Water Resources Management +17

Pesticides in ground water: distribution, trends, and governing factors.

Jack E. Barbash, Elizabeth A. Resek · 1996 · 275 citations

Natural Resources, Environmental Sciences, Hydrology +12

Contaminants in the Mississippi River, 1987-92

Robert H. Meade · U.S. Geological Survey circular/U.S. Geological Survey Circular · 1995 · 269 citations · Full text

Natural Sciences, Chemistry, Environmental Sciences +17