sponsored by the Geo-Institute of the American Society of Civil Engineers in conjunction with the ASCE Convention in Washington, D.C., November 10-14, 1996 ; edited by Thomas C. Sheahan and Victor N. Kaliakin
edited by W. Burke, D. Gabriels, [and] J. Bouma ; sponsored by the Commission of the European Communities, Directorate-General for Agriculture, Coordination of Agricultural Research