X stands for unknown
By: Isaac Asimov.
Edition: 1st ed.
Publisher: Doubleday
Published: 1984
Place of publication: Garden City, N.Y
Language: eng
Number of pages: 218
Subjects: Science; Mathematics
Other titles: Magazine of fantasy and science fiction (Cornwall, Conn.)
Description: 17 essays selected from the magazine "Fantasy and science fiction."
Notes: Essays selected from the Magazine of fantasy and science fiction.