Science Fiction and Fantasy Literature, A Checklist, 1700-1974, Volume one of Two, contains an Author Index, Title Index, Series Index, Awards Index, and the Ace and Belmont Doubles Index.
The definitive Harry Harrison bibliography, with lengthy annotations and a special bonus--the Harrison story written for Harlan Ellison's unpublished Last Dangerous Visions anthology.
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An index to the works of 20th Century science fiction authors.
A guide to Aldiss's fictional output from the 50's to the 80's.