Internastional Symposium on Fast Reactor physisAix-En-Provence 1979. International symposium on the electrophysiology of the heart International Symposium on therosclerosis 5th Houston 1979 International Symposium on Arterial Hypertension,2nd,Caracas,1979. International Symposium on Gastric Cancer International Symposium on Chromatography and Electrophoresis,10th,Venice,1979. International symposium on advanes iniintyerceation and packagining 5-9 November 1990