International Symposium"Radionuclides in Nephrology",3d Karl zum Winkel., (Berlin)International Symposium"Radionuclides in Nephrology",3d International Symposium on Lasers in Dermatology (Antwerp,Belgium)International Symposium on Gas Separation Technology (Lyon)Internation Symposium on Radioimmunology (Lake Placid)International Symposium on Cellular Endocrinology First international congress of nephrology International Symposium on Intervention Radiology (Wash.)International Symposium on Rocket and Satellite Meteorology (Orlando,Fla.)International Symposium on Coal Slurry Combustion and Technology