Provides bibliographic citations to scientific literature covering a wide variety of water-related topics.
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Provides bibliographic citations to scientific literature covering a wide variety of water-related topics.
See information about, and related to, U.S. Department of Agriculture's Conservation Effects Assessment Project (CEAP).
Environmental Protection Agency.
Provides access to EPA publications.
U. S. Geological Survey.
Provides access to water publications from the U. S. Geological Survey.