| I | - Tucson, Arizona (USA) | 1962 |
| II | - Utrecht (Netherlands) | 1966 |
| III | - Novosibirsk (USSR) | 1971 |
| IV | - Lucknow (India) | 1976 |
| V | - Cambridge (England) | 1980 |
| VI | - Calgary (Canada) | 1984 |
| VII | - Brisbane (Australia) | 1988 |
| VIII | - Aix-en-Provence (France) | 1992 |
| IX | - Houston, Texas (USA) | 1996 |
| X | - Nanjing (China) | 2000 |
| XI | - Granada (Spain) IFPS Travel Support |
2004 |