OrigTitel/4026
| ws-page-props | |||
|---|---|---|---|
| Regel 2: | Regel 2: | ||
|Titel=Opening Problem | |Titel=Opening Problem | ||
|VerschenenIn=Galaxy Science Fiction, July | |VerschenenIn=Galaxy Science Fiction, July | ||
|BoekPub=Necessary and Sufficient | |||
|Jaartal=1974 | |Jaartal=1974 | ||
|Taal=Engels | |Taal=Engels | ||