International Symposium on Processes Governing the Movement and Fate of Contaminants in the Subsurface Environment (1989 : Stanford University, Calif.)
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)
produced for the U.S. Environmental Protection Agency by the National Recreation and Park Association, Arlington, Virginia and Design Communication Collaborative, Washington, D.C