Material audio-visual : su naturaleza y utilización /

by Wittich, Walter Arno 1910-, Wittich, Walter Arno 1910-, Schuller, Charles Francis
Published 1965

Material audio-visual : su naturaleza y utilización /

by Wittich, Walter Arno 1910-, Wittich, Walter Arno 1910-, Schuller, Charles Francis
Published 1970

Audio-visual materials : their nature and use /

by Wittich, Walter Arno 1910-, Wittich, Walter Arno 1910-, Schuller, Charles Francis
Published 1957