Some numbers for 1973-1974 include supplement: Learning Resources, published separately beginning Dec. 1974
Notes
Description based on: Vol. 7, no. 1 (Jan. 1962); title from cover
Numbering
June issues, 1958-1960, lack numbering
Issuing Body
Published 1956-June/July 1970 by: Dept. of Audiovisual Instruction, National Education Association of the United States; Sept. 1970-May 1978 by: Association for Educational Communications and Technology