Columbia subject headings:
Harvard subject headings:
Drinking water--Purification--Research--United States--Finance.
Federal aid to water quality management--United States
United States. Department of Energy--Appropriations and expenditures.
United States. Environmental Protection Agency. Office of Research and Development--Appropriations and expenditures.
United States. National Oceanic and Atmospheric Administration--Appropriations and expenditures.
Princeton subject headings:
Drinking water--Purification--Research--United States--Finance.
Federal aid to water quality management--United States.
United States. Department of Energy--Appropriations and expenditures.
United States. Environmental Protection Agency. Office of Research and Development--Appropriations and expenditures.
United States. National Oceanic and Atmospheric Administration--Appropriations and expenditures.