A guide to the use of visual aids,
Powell, Leonard Sutherland.
A guide to the use of visual aids, by L. S. Powell. - London, British Association for Commercial and Industrial Education, 1968. - 53 p. illus. 22 cm.
Bibliography: p. 39-40.
85171016
78378713
B68-12713
371.33/5 POW
A guide to the use of visual aids, by L. S. Powell. - London, British Association for Commercial and Industrial Education, 1968. - 53 p. illus. 22 cm.
Bibliography: p. 39-40.
85171016
78378713
B68-12713
371.33/5 POW