Trends in selected water-quality characteristics, Powder River and tributaries, Montana and Wyoming, water years 1968-88 and 1975-88 /

Mode of access: Internet.

Ground water in the Niagara Falls area, New York, with emphasis on the water-bearing characteristics of the bedrock.

"Reports dealing with ground-water conditions in New York": p. 91-93.

Dynamic modeling and monitoring of water, sediment, nutrients, and pesticides in agricultural watersheds during storm events /

"Contract report 655"--Cover.

A Review of surface-water sediment fractions and their interactions with presistent manmade organic compounds /

Mode of access: Internet.