Report. 

 - Nendeln :  Kraus Reprint,  1971. 
 - Educational studies and documents. First series ;  Educational studies and documents. First series ;  20 .
<br/><br/> "Sponsored by the American Educational Research Association (a department of the National Education Association) in cooperation with Unesco."  First published by Unesco, Paris, 1956. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education -- Research -- Congresses.--Education -- Research -- Congresses.--Education -- Research -- Congresses.