Justo a tiempo
| Publisher | Editorial Molino |
| Series | Las aventuras de Guillermo |
| First Published by | Just William |
| Format | Soft cover |
| Language | Spanish |
| Location | Barcelona, Spain |
| Copyright | 1980 |
| This Edition Published | 1980 |
| Pages / Font | 28 pages |
| ISBN 10 | 8427261039 |
| DL (Spanish) | B. 303-1981 |
| Series Number | 3 |
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