Encyclopedia of educational research  A project of the american educational research association 

 - Fourth 
 - London  The Macmillan  Company  1960 
 - xxviii,(2),1522  Hb 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>370.78