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by U. S. Environmental Protection Agency
by U. S. Department of Energy; Evaluation, Measurement, and Verification Working Group
by National Geographic Society (U. S.)
by United States Environmental Protection Agency
by Aswathanarayana, U.; Harikrishnan, Tulsidas; Kadher-mohien, Thayyib S.
by Miller, Roger LeRoy; Hollowell, William E.
by Martin, Fenton S.; Goehlert, Robert U.