Proceedings of a symposium organized by IRIA, Institut de recherche d'informatique et d'automatique, 78-Rocquencourt, France, July 3-7, 1972. Edited by M. Nivat
organized by the University of Newcastle upon Tyne (U.K.) and sponsored by the World Meteorological Organization and the International Association of Hydrological Sciences, Newcastle upon Tyne, 19-23 August 1974