Bulletin de la Société Française Radio-Electrique, 6ème Année, N° 1, Janvier 1932.
Emile Girardeau, pp 1-4, auteur Henri Bousquet
Gustave Ferrié, pp 20-28, auteur Paul Brenot
Joseph Béthenot, pp 47-49, auteur non disponible
Fotos de Girardeau, Ferrié et Béthenod par G.L. Manuel Frères, rue Dumont d’Urville, Paris
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Emile Girardeau, pp 1-4, auteur Henri Bousquet
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Gustave Ferrié, pp 20-28, auteur Paul Brenot
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Joseph Béthenot, pp 47-49, auteur non disponible
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