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W
Wiersma, G.B., K.W. Brown, R. Herrman, C. Taylor, and J. Pope. Great Smoky Mountains Preliminary Study for Biosphere Reserve Pollutant Monitoring. Las Vegas, Nev. : Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Springfield, Va. : National Technical Information Service distributor , 1979.
B
Brown, Kenneth Warren, G B. Wiersma, and Clyde W. Frank. A battery-operated air sampler for remote areas. Las Vegas, Nev.: Environmental Monitoring and Support Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1979.