P.T.O.= Probabilità Tempo Onda
| First published | August 1953 |
|---|---|
| Type | Short Fiction |
| Length | Short Story |
{{Tr|an unknown hand}}
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| August 1953 |
|
Urania #10 | Mondadori | MAGAZINE | 78 |