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)
organized by the Urban Water Resources Research Council of the Technical Council on Research of the American Society of Civil Engineers ; co-sponsored by the U.S. National Science Foundation [and] American Public Works Association [and] U.S. Environmental Protection Agency ; edited by Ben Urbonas and Larry A. Roesner