DDT As a Mosquito Larvicide

Reviews material presented in motion picture, same title. (CDC-5-074; 81 frames, synchronized disc, 17 minutes) Dead Reckoning U.S. Department of the Navy, 1942. Theory of dead reckoning; its practical applications. The Deck: Setting a Web Frame and a Transverse Beam U.S. Office of Education, 1943. (Shipbuilding Skills Series. Work of Shipfitterand Shipwright No. 6) Reviews material presented in motion picture, same title. (OE 29; 47 frames)