Sampling and analysis of toxic organics in the atmosphere a symposium sponsored by ASTM Committee D-22 on Sampling and Analysis of Atmospheres, American Society for Testing and Materials, Boulder, Colo., 6-9 Aug. 1979 ; S. S. Verner, U.S. Environmental Protection Agency, symposium chairman. - Verner, S. S. (Journal of ASTM International., 1980)