Proceedings of two Workshops Held at the University of Bielefeld, Spring 1980

Proceedings of the International Conference on Algebraic Geometry Held at La Rabida, Spain, January 1981

Proceedings of the S.E.R.C. Summer School, Lancaster, July 19 - August 21, 1981

Proceedings of a Conference Held at Schloss Rauischholzhausen, May 6-9, 1982

Journees S.M.F., Universite de Rennes 1, Mai 1981

Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980

Proceedings of a Polish-North American Seminar Held at the University of British Columbia, January 15 - February 15, 1981

Proceedings of the Ninth Australian Conference on Combinatorial Mathematics Held at the University of Queensland, Brisbane, Australia, August 24-28, 1981