International Symposium on Requirements for Poultry Virus Vaccines,Lyon,1973. International Symposium on Air Breathing Engines International Symposium on the Prospects for Treatment of Radioresistant Cancers International symposium on stress wave propagation in materials International symposilum on Governmental Non-Tax Tevenue Management International Symposium on Methodologies for Intelligent Systems International Symposium on the Chemistry of Cement International Symposium on Herpesvirus. International symposium on Humidity and Moisture International symposium on the chemistry of the coordination compounds