Workers Film and Photo League (USA)
The Workers Film and Photo League was an organization of filmmakers, photographers, writers and projectionists in the 1930s, dedicated to using film and photography for social change. == History == Founded in 1930, the WFPL produced documentaries of the U.S. labor movement including the National Hunger marches of 1931 and 1932 and the Bonus March 1932.
Source: Wikipedia — Workers Film and Photo League (USA) (CC BY-SA 4.0)