1. National Capital region water and waste management report Author/Creator: United States. Environmental Protection Agency Publication/Creation: [Washington] : [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1971 Resource Type: Book Access & Availability: Loading
2. National environmental publications Internet site (NEPIS) Author/Creator: United States. Environmental Protection Agency Publication/Creation: Cincinnati, Ohio : National Service Center for Environmental PUblications [distributor] Resource Type: Journal, Newspaper or Serial Access & Availability: Loading
3. National Environmental Research Centers Author/Creator: United States. Environmental Protection Agency Publication/Creation: [Washington] : [The Agency], 1973 Resource Type: Book Access & Availability: Loading
4. National pollutant discharge elimination system adjudicatory hearing proceedings : decisions of the Administrator and decisions of the General Counsel Author/Creator: United States. Environmental Protection Agency Publication/Creation: Washington : U.S. Environmental Protection Agency, [1976?-] Resource Type: Book Access & Availability: Loading