Magazine of Fantasy and Science Fiction (1949-Present Mercury Publications) Vol. 63 #5

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November 1982. A collection science fiction novellas, short stories, and essays. One essay, Isaac Asimov's "A Difference of an E", talks about silicon atoms and silicone molecules(Asimov stresses that difference of e very much) in such a way as to detail their differences and properties, and give examples of their usage; in particular Asimov talked about silicon-based life, a type of life theorized by scientists and science fiction authors alike, similar to how some have theorized that xenomorphs are silicon-based. 5.5" x 7.5", 164 pages, B&W. Cover price $1.75.