Pollution and hydrology of surface and groundwater : selected reports ; Vol. 13 part 3 Columbia University. University Seminar on Pollution and Water Resources. Water Pollution. TD423 .P64 1981 363.7394 19 HAP Includes bibliographies. New York : Pergamon Press, c1981. c1981. 1981 Text vii, 205 p. : eng Pollution and water resources, Columbia University seminar series ; v. 13, pt. 3