Internation Symposium on Radioimmunology International Symposiumon Food Microbilogy,4th Gotebiry,1964 International Symposium on Cellular Endocrinology International Symposium on Lasers in Dermatology International Symposium on Intervention Radiology International symposium on mining research Practical course on food microbiology International symposium on Humidity and Moisture International Symposium on Gas Separation Technology 1st International symposium on ramie prifession