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Four Hundred Octaves

Isaac Asimov

First published June 1982
Type Essay
Series Asimov's Essays: F&SF

Publications (4)

Date Publication Publisher Type Page
June 1982 Cover The Magazine of Fantasy & Science Fiction, June 1982 Mercury Press, Inc. MAGAZINE 137
February 1984 Cover X Stands for Unknown Doubleday Nonfiction 26
March 1985 Cover X Stands for Unknown Discus / Avon Nonfiction 26
1986 Cover X Stands for Unknown Grafton Nonfiction 29