Preparation and use of audio-visual aids /
Haas, Kenneth B. 1898-
Preparation and use of audio-visual aids / Kenneth B. Haas, Harry Q. Packer ; drawings by Bert Paul Kuhn. - 3rd ed. - Englewood Cliffs, N.J. : Prentice-Hall, 1955. - 381 p. : ill. ; 24 cm.
Includes index.
Audio-visual education.
Preparation and use of audio-visual aids / Kenneth B. Haas, Harry Q. Packer ; drawings by Bert Paul Kuhn. - 3rd ed. - Englewood Cliffs, N.J. : Prentice-Hall, 1955. - 381 p. : ill. ; 24 cm.
Includes index.
Audio-visual education.
