Leur grand secret
| Series | Groom Lake |
| Number | Vol. 2 |
| Publisher | Grand Angle |
| Date | 2007 |
| Type | Comic Book, Hardcover |
| Language | French |
| Artist | Jean-Jacques Dzialowski |
| Colorist | Cyril Saint Blancat |
| Writer | Hervé Richez |
| Genre | Science Fiction |
| Published in | France |
| ISBN | 978-2-35078-250-8 |
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