Covers by Kelly Freas
The covers listed here are not necessarily Robert Silverberg books, but may include magazines and anything else in the database.
- Amazing Stories August 1991 ( 1991)
- Astounding Science Fiction April 1957 ( 1957)
- Astounding Science Fiction July 1957 ( 1957)
- Astounding Science Fiction November 1957 ( 1957)
- Astounding Science Fiction December 1957 ( 1957)
- Capricorn Games (Donning Starblaze 1979)
- Fantasy & Science Fiction May 1957 ( 1957)
- Future Science Fiction Summer 1957 (#33) ( 1957)