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Continue to ChatRETRO DAYS: ROBERT A. HEINLEIN and SPIDER ROBINSON https://amazingstories.com/2017/02/retro-days-robert-heinlein-spider-robinson/
RETRO DAYS: ROBERT A. HEINLEIN and SPIDER ROBINSON https://amazingstories.com/2017/02/retro-days-robert-heinlein-spider-robinson/