Algebraic threefolds : proceedings of the 2nd 1981 Session of the Centro Internazionale Matematico Estivo (C.I.M.E), held at Varenna, Italy, June 15-23, 1981 /
proceedings of the 2nd 1981 Session of the Centro Internazionale Matematico Estivo (C.I.M.E), held at Varenna, Italy, June 15-23, 1981 /