Conference in the Matter of Pollution of the Navigable Waters of Dade County, Florida, and Tributaries, Embayments and Coastal Waters (3rd : 1971 : Miami, Fla.)
Conference in the Matter of Pollution of the Interstate Waters of the Colorado River and Its Tributaries in the States of California, Colorado, Utah, Arizona, Nevada, New Mexico, and Wyoming (7th : 1972 : Denver)
Conference in the Matter of Pollution of the Interstate Waters of Long Island Sound and its tributaries in the states of Connecticut and New York (1971 April 13-14 : New Haven, Ct.)
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 the Interstate Waters of the Monongahela River and its Tributaries--Pennsylvania, West Virginia, Maryland (2nd Session : 1971 : Pittsburgh, Pa.)
Conference in the Matter of Pollution of the Interstate Waters of the Ohio River and Its Tributaries in the Wheeling, West Virginia Area (Ohio-West Virginia) (1971. : Wheeling)
Conference in the Matter of Pollution of Lake Superior and its Tributary Basin in the States of Minnesota, Wisconsin, and Michigan (1971 : Duluth, Minn.)