Search Results for the EPA National Library Catalog

Items Found: 5

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Your Search: (AUTHOR=Simpson AND Robert AND L.)


Select Item Title Year Published
Effect of sewage effluent on the structure and function of a freshwater tidal marsh ecosystem 1980
Fluxes of heavy metals in Delaware River freshwater tidal wetlands : final report / 1983
Freshwater wetlands : ecological processes and management potential / 1978
Hypoxia in the Northern Gulf of Mexico [electronic resource] / 2010
The ecological effects of the aquatic herbicide fenac on small ponds / 1971

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