Placement
- Black Widowers
- contained in More Tales of the Black Widowerscollection
- contained in Opus 200collection
- contained in Opus: A Selection from the First 200 Booksomnibus
- contained in The Asimov Chronicles: Fifty Years of Isaac Asimovcollection
- contained in The Asimov Chronicles: Fifty Years of Isaac Asimov!: Volume Fivecollection
- contained in The Asimov Chronicles: Fifty Years of Isaac Asimov: Volume Twocollection