Combined lists of environmental laboratories.

Cover title.

Economic impact study of proposed cross connection regulations, R87-37 : final report /

"Project: 89/283."

Land-use contribution to in-stream constituent loadings /

Bibliography: p. 18.

U.S. EPA regulations have changed the focus of lead and copper monitoring.

Caption title.

The National cancer program [microform] : hearing before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-fifth Congress, first session.

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