conference
- 10th World Science Fiction Convention
- 11th World Science Fiction Convention
- 12th World Science Fiction Convention
- 13th World Science Fiction Convention
- 14th World Science Fiction Convention
- 15th World Science Fiction Convention
- 16th World Science Fiction Convention
- 17th World Science Fiction Convention
- 18th World Science Fiction Convention
- 1960 International Meeting of Communist and Workers Parties
- 19th World Science Fiction Convention
- 1st World Science Fiction Convention
- 20th World Science Fiction Convention
- 21st World Science Fiction Convention
- 22nd World Science Fiction Convention
- 23rd World Science Fiction Convention
- 24th World Science Fiction Convention
- 25th World Science Fiction Convention
- 26th World Science Fiction Convention
- 27th World Science Fiction Convention
- 28th World Science Fiction Convention
- 29th World Science Fiction Convention
- 2nd World Science Fiction Convention
- 30th World Science Fiction Convention
- 31st World Science Fiction Convention
- 32nd World Science Fiction Convention
- 33rd World Science Fiction Convention
- 34th World Science Fiction Convention
- 35th World Science Fiction Convention
- 36th World Science Fiction Convention
