A guide to the use of visual aids
By: by L. S. Powell.
Contributors: British Association for Commercial and Industrial Education.
Edition: 3rd ed.
Publisher: British Association for Commercial & Industrial Education
Published: 1970
Place of publication: London
Language: eng
Number of pages: 27
Subjects: Visual aids.; Visual education.
Notes: Previous ed. (B68-12713) 1968.

bibl p27.