TY  - BOOK
AU  - Walker, David Addison
ED  - Center for International Education
TI  - Understanding pictures: a study in the design of appropriate  visual materials for education in developing countries / by  David Addison Walker
U1  - B 16.4 WAL -3373   
CY  - Massachusetts, 1979.
KW  - Underdeveloped areas - Education
KW  - Pictures in education
KW  - Picture interpretation
KW  - EDU
ER  -