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Are you Gilbert Klopfstein, author of the books below?
Comprendre l'avion by Gilbert Klopfstein COMPRENDRE L'AVION - T3 - Propulsion by Gilbert Klopfstein COMPRENDRE L'AVION - T2 - Mécanique du vol by Gilbert Klopfstein L'air et l'avion by Gilbert Klopfstein Comprendre l'avion. L'Air et l'Avion. Tome 1 by Gilbert Klopfstein


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