00895nam a2200241 a 4500 4628179 091008s1979 nyua b 001 0 eng d \\\78012812 0060471697 DLC DLC DLC 371.33 19 Wittich, Walter Arno, 1910- Instructional technology : its nature and use / Walter A. Wittich, Charles F. Schuller. 6th ed. New York : Harper & Row, c1979. xx, 331 p. : ill. ; 24 cm. Includes bibliographies and index. Audio-visual education. Schuller, Charles Francis, joint author. 4325 4325 0 0 ddc 0 0 BRACUL BRACUL GEN 2009-10-08 0.00 0 371.33 WIT 3010005167 2009-10-08 1 2009-10-08 BK