1. Social documentaries of the '30s Record type: document Document type: program Publication date: 5/1/1972 Document source: Berkeley Art Museum/Pacific Film Archive Document contains: production co Number of pages: 1 Related films: Night mail — Grierson, John — No country known — 1936The River — Lorentz, Pare — No country known — 1937Valley town - a study of machines and men — Dyke, Willard Van — No country known — 1940