Water pollution control : experimental procedures for process design / W. W. Eckenfelder [and] D. L. Ford. Eckenfelder, W. Wesley (William Wesley), 1926- Ford, Davis L., joint author. Sewage Purification. TD745 .E25 628.168 ECW Includes bibliographical references. Austin ; New York : Pemberton Press, 1970. 1970. 1970 Text 269 p. : eng