How to use training aids
Series: Training manual -- no. 133; Training manual (United States. International Cooperation Administration. Technical Aids Branch) -- 133.; Training manual -- no. 133.
Publisher: Department of State, Agency for International Development, Communications Resources Division
Published: 1961
Place of publication: Washington
Language: eng
Number of pages: 23
Subjects: Audio-visual materials; Economic development projects; Audio-visual aids