Marcon XX was held May 10-12, 1985 at the Sinclaire Plaza in Columbus, OH. Author GoH was Larry Niven, Artist GoH was Carl Lundgren, and Music GoH was Bill Maraschiello. Toastmaster was Valerie Stewart.
|Marcon XIX||Marcon||Marcon XXI|
Also involved: - Convention timeline - Marcon 20 - Marcon-20 - Marcon-xx
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