sponsored by the Environmental Protection Agency, the National Center for Atmospheric Research, and Committee D-22 on Methods of Sampling and Analysis of Atmospheres, American Society for Testing and Materials, Boulder, Colo., 14-16 Aug. 1973
Conference in the Matter of Pollution of the Interstate Waters of the Escambia River Basin (Alabama-Florida) and the Intrastate Portions of the Escambia Basin within the State of Florida (1971 : Pensacola, Fla.)
Conference in the Matter of Pollution of Lake Superior and its Tributary Basin in the States of Minnesota, Wisconsin, and Michigan (1971 : Duluth, Minn.)
Conference in the Matter of Pollution of the Navigable Waters of Dade County, Florida, and Tributaries, Embayments and Coastal Waters (3rd : 1971 : Miami, Fla.)