Books: Histoire de L'Aeronautique, by Charles Dollfus &

Books: Histoire de L'Aeronautique, by Charles Dollfus & Henri Bouche, Histoire de la Locomotion Terrestre, les Chemins de Fer, by Charles Dollfus and Edgar de Geoffroy, and Histoire de la Locomotion Terrestre, la locomotion naturelle l'attelage - la voiture, le cyclisme, la locomotion mecanique, l'automobile, by Baudry de Saunier, Charles Dollfus and Edgar de Geoffroy. Published Paris 1935. (3)