Understanding pictures
Subtitle: a study in the design of appropriate visual materials for education in developing countries
By: by David Addison Walker.
Publisher: Walker
Published: 1978
Place of publication: [s.l.]
Language: eng
Subjects: Pictures in education.; Non-formal education.; Education -- Developing countries.
Notes: Thesis--University of Massachusetts.
Includes bibliographical references.
Cover title.
Both parts 2 have on cover: Preliminary draft.