- London: George G. Harrap & Co. Ltd.; Paris: United Nations Educational, Scientific and Cultural Organization, 1966.
- cloth, dust jacket.
- 225 pages.
Price: $5.00 save 20% $4.00 other currencies
Order Nr. 47728
First edition. An attempt to study the scientific aspects of the educational psychology of some audio-visual aids used in education. Jacket stained.