What might have been.
By: edited by Gregory Benford and Martin H. Greenberg.
Contributors: Benford, Gregory, 1941-; Greenberg, Martin Harry.
Publisher: Bantam Books
Published: 1989
Place of publication: New York
Language: eng
Number of pages: 542
Subjects: Science fiction, American
Table of contents: title: v. 1. Alternate empires; title: v. 2. Alternate heroes.