National environmental monitoring :
hearings before the Subcommittee on Natural Resources, Agriculture Research, and Environment of the Committee on Science and Technology, U.S. House of Representatives, Ninety-eighth Congress, first session, May 19, 26; June 2, 1983.
|Corporate Author:||United States.|
Washington : U.S. G.P.O., 1984.
Environmental monitoring /
iii, 406 p. :
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