International Symposium on Processes Governing the Movement and Fate of Contaminants in the Subsurface Environment (1989 : Stanford University, Calif.)
by Edward J. Koszalka ... [and others] ; prepared by the U.S. Geological Survey in cooperation with the New York State Department of Environmental Conservation
prepared by U.S. Environmental Protection Agency, Region VI, and U.S. Geological Survey, Department of the Interior with cooperation of Forest Service, U.S.D.A