TY - BOOK AU - Russell,James D. TI - The audio-tutorial system T2 - The Instructional design library AV - LB 1049 .R88 1978 PY - 1978/// CY - Englewood Cliff, N.J. PB - Educational Technology Publications KW - Independent study KW - Local KW - Programmed Instruction KW - Audiovisual education N1 - Bibliography: p. 61 ER -