Roger-Viollet | 245066 | LA FRANCE TRAVAILLE. SOURCES OF ENERGY | © François Kollar / Bibliothèque Forney / Roger-Viollet
Roger-Viollet | 245066 | LA FRANCE TRAVAILLE. SOURCES OF ENERGY | © François Kollar / Bibliothèque Forney / Roger-Viollet

Sources of energy. Alsthom company : Frame of the motor of a rolling machine. Belfort (France), 1931-1934. Photograph by François Kollar (1904-1979). Paris, Bibliothèque Forney.

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