530,878 ULCERATIVE Ulcerative colitis and Crohn a disease and other diseases of the alimentary system in childhood.Papers presented at an Interna-­ tional Symposium on... sponsored by the Austrian Association of Pediatric Surgeons and held in Obergurgl,Austria,in January 1976.Ed.P.P.Rickham,W.Ch.Hecker,J.Prevot. Baltimore 1978 Urban and Schwarzenberg 8° s. VI,242,il. Progress in Pediatric Surgery vol.11