Walter Arno Wittich & John Guy Fowlkes.
Audiovisual paths to learning; a comparison of three classroom methods of using educational sound films.
R569821. Audiovisual paths to learning; a comparison of three classroom methods of using educational sound films. By Walter Arno Wittich & John Guy Fowlkes. © 10Apr46; A2411. Walter A. Wittich (A); 1Feb74; R569821.
Walter A. Wittich|A