00783cam a2200253 4500 0000004468 20230921134608.0 150417s1979 nyu 000 0 eng d 0060471697 Wittich, Walter A. Instructional technology : its nature and use. 6th. New York : Harper and Row, 1979. xx, 331p. Includes index. teaching aids. Educational technology. Educational technology. sears SCHULLER, Charles F. 20230822095114.0 981 981 0 0 0 0 cutlib cutlib 2023-09-21 0 LB 1043 WIT BK0009349 2023-09-21 00:00:00 005593 2023-09-21 BK 0 0 0 0 cutlib cutlib 2023-09-21 0 LB 1043 WIT BK0009352 2023-09-21 00:00:00 001262 2023-09-21 BK 0 0 0 0 cutlib cutlib 2023-09-21 0 LB 1043 WIT BK0009026 2023-09-21 00:00:00 005594 2023-09-21 BK