Interior of an automobile factory with assembly line, ca.1939

Photograph of an interior of an automobile factory with assembly line, ca.1939. A line of finished cars stretched from the foreground to the background inside the factory. The first car in the line has a man behind the wheel while two men stand to the right. In the background, three men are visible standing to the left of the cars. The cars glisten by the lights hanging from the ceiling above. According to some sources, it may be the General Motors' South Gate Assembly plant