produced for the U.S. Environmental Protection Agency by the National Recreation and Park Association, Arlington, Virginia and Design Communication Collaborative, Washington, D.C
Conference in the Matter of Pollution of the Navigable Waters of Dade County, Florida, and Tributaries, Embayments and Coastal Waters (2nd : 1971 : Miami, Fla.)
Conference in the Matter of Pollution of Lake Superior and its Tributary Basin in the States of Minnesota, Wisconsin, and Michigan (2nd session : 1970 : Duluth)