S2025 E26 | Glen Canyon Dam Construction - 1961

E61 | Women Workers in B-24 Bomber Plant - 1943

E60 | Trucks and the American Economy - 1937

E55 | Recognizing Japanese Fighter Planes - 1943

E54 | Photographing the Moon - 1967

E50 | History of the Chinese Communist Party -- 1964

E43 | Miracle of the Can - 1956

E42 | Controversy of Teaching Communism 1954

E41 | Advancements in Military Night Vision Technology 1974

E38 | Radios & World War II -- 1944

E27 | A Step-Saving Kitchen -1949

E26 | Glen Canyon Dam Construction - 1961

E24 | Let's Look at Congress - Marietta Tree, U.N. Delegate 1964