United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment. (1998). Fiscal year 1998 budget authorization request: Environmental Protection Agency (EPA) research and development : hearing before the Subcommittee on Energy and Environment of the Committee on Science, U.S. House of Representatives, One Hundred Fifth Congress, first session, March 11, 1997. Washington: U.S. G.P.O. : For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office.

United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment. Fiscal Year 1998 Budget Authorization Request: Environmental Protection Agency (EPA) Research and Development : Hearing Before the Subcommittee On Energy and Environment of the Committee On Science, U.S. House of Representatives, One Hundred Fifth Congress, First Session, March 11, 1997. Washington: U.S. G.P.O. : For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office, 1998.

United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment. Fiscal Year 1998 Budget Authorization Request: Environmental Protection Agency (EPA) Research and Development : Hearing Before the Subcommittee On Energy and Environment of the Committee On Science, U.S. House of Representatives, One Hundred Fifth Congress, First Session, March 11, 1997. Washington: U.S. G.P.O. : For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office, 1998.