Change of Time and States
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Overview:
- Title: Change of Time and States
- Author: Isaac Asimov
- Year: 1982
- Type: Essays
- Series: Asimov's Essays: F&SF
Variant Titles:
Editions/Publications:
- Unknown. The Magazine of Fantasy & Science Fiction, April 1982 (Unknown, Isaac Asimov, Mercury Press, Inc., $1.50, 164 pages, digest, MAGAZINE)
- Unknown. X Stands for Unknown (Unknown, Isaac Asimov, Discus / Avon, ISBN-10: 0380698471, $3.95, 218 pages, Paperback, Non-fiction)
- 1984 . X Stands for Unknown (1984, Isaac Asimov, Doubleday, ISBN-10: 038518915X, $13.95, 218 pages, Hardcover, Non-fiction)