Audio-visual materials of instruction 
ed. by Nelson B. Henry. 
 - Chicago  Univ. of Chicago Press  1949. 
 - x, 314 p.  22 cm. 
 - Yearbook of the National Society for the Study of Education, 48th, pt. 1 .
 - National Society for the Study of Education.  Yearbook  48th, pt. 1. .
<br/><br/>Includes "References." 
<br/><br/><label>LCCN: </label>49008494  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Visual education.
<br/><br/><label>LC Class. No.: </label>LB5  / .N25 48th, pt. 1 
<br/><br/><label>Dewey Class. No.: </label>370.62