por Bogen, J [editor] | Walling, D. E [editor] | Day, T. J [editor].
por Hasholt, B [editor] | Davies, T. R [editor] | Walling, D. E [editor] | Chung-kuo ko hsueh yuan. Institute of Mountain Disasters and Environment | IAHS International Commission on Continental Erosion International Commission on Continental Erosion.
por Bordas, M. P [editor] | Walling, D. E [editor] | International Association of Hydrological Sciences | International Association Of Hydrological Science. Symposium (1988 : Porto Alegre, Brasil).