Measuring the effectiveness of sound pictures as teaching aids /
Arnspiger, V. Clyde(Varney Clyde),1896-1971.
Columbia University.Teachers College.Bureau of Publications.
New York : Bureau of Publications, Teachers College, Columbia University,
1933.
Issued also as thesis (Ph. D.) Columbia University.
Includes bibliographical references.
Motion pictures in education.
Silent films.
Natural history
Music