Placement
- contained in Arthur C. Clarke Audiobook Collectionomnibus
- contained in History Lessoncollection
- contained in Tales from Planet Earthcollection
- contained in Tales of Ten Worldscollection
- contained in The Arbor House Treasury of Great Science Fiction Short Novelsanthology
- contained in The Collected Stories of Arthur C. Clarkecollection
- contained in The Collected Stories: Volume Twocollection