Introduction (X Stands for Unknown)
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Overview:
- Title: Introduction (X Stands for Unknown)
- Author: Isaac Asimov
- Year: 1984
- Type: Essays
- Series: Asimov's Essays: Own Work
Editions/Publications:
- Unknown. X Stands for Unknown (Unknown, Isaac Asimov, Grafton, ISBN-10: 0586058427, £2.95, 270 pages, Paperback, Non-fiction)
- 1984 . X Stands for Unknown (1984, Isaac Asimov, Doubleday, ISBN-10: 038518915X, $13.95, 218 pages, Hardcover, Non-fiction)