Opus : a selection from the first 200 books /
Asimov, Isaac,1920-1992.
Asimov, Isaac,1920-1992.Opus 100.
Asimov, Isaac,1920-1992.Opus 200.
London Deutsch
1980
Contents: Opus 100. This collection originally published: Boston : Houghton Mifflin, 1969 - Opus 200. This collection originally published: Boston : Houghton Mifflin, 1979