Erosion and sediment transport monitoring programmes in river basins : proceedings of the international symposium held at Oslo, Norway, 24-28 August 1992 ... jointly organized by the Norwegian Water Resources and Energy Administration and the International Commission on Continental Erosion of the International Association ofHydrological Sciences and co-sponsored by UNESCO, WMO, the Norwegian Geophysical Union and the Norwegian National Committee for Hydrology / edited by J. Bogen, D.E. Walling, T.J. Day.