Powell, Len S.
Communication and learning / Len S. Powell. - London : Pitman, 1969. - xii, 217 p. : illus., maps., plates ; 25 cm.
0444197451
Learning.
Audio-visual education.
Communication in education.
371.3 / POC
Communication and learning / Len S. Powell. - London : Pitman, 1969. - xii, 217 p. : illus., maps., plates ; 25 cm.
0444197451
Learning.
Audio-visual education.
Communication in education.
371.3 / POC