Market28th World Science Fiction Convention
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28th World Science Fiction Convention

The 28th World Science Fiction Convention (Worldcon), also known as Heicon '70, was held on 20–24 August 1970 at the Stadthalle Heidelberg in Heidelberg, West Germany.

Participants
Attendance was approximately 620. Guests of honor E. C. Tubb (UK) (pro) • Robert Silverberg (US) (pro) • Herbert W. Franke (Germany) (pro) • Elliot K. Shorter (fan), the 1970 TAFF winner • John Brunner (toastmaster) == Awards ==
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