Occasional paper
TDP : National Education Association of the United States
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by Humboldt W. Leverenz and Malcolm G. Townsley
Technological Development Project, National Education Association of the United States [1962] Occasional paper no. 8
Available at 1 libraries
by James D. Finn, Donald G. Perrin and Lee E. Campion
[For sale by the Dept. of Audio-Visual Instruction, National Education Association] [1962] Occasional paper no. 6 . Studies in the growth of instructional technology ; I
by Lee E. Campion and Clarice Y. Kelley ... [et al.]
TDP : National Education Association of the United States [1962] Occasional paper no. 10 . Studies in the growth of instructional technology ; 2