Editor, Jan Becker ; sponsored by Department of Professional Development and Conference Services, Department of Civil and Mineral Engineering, Continuing Education and Extension, University of Minnesota ; in coorperation with American Society of Civil Engineers, Minnesota Geotechnical SocietyUniv. of Minnesota1987
sponsored by American Spcoety of Civil Engineers, Minnesota Geotechnical Society ; conducted by Department of Conferences, Continuing Education and Extension, University of MinnesotaUniv. of Minnesota[1978]