Lehmann Irvin J Ed. <br/><br/>
Educational research: Readings in focus 

 - 2 
 - New York, USA  Holt, Rinehart and Winston   1971 
 - xii,433p. 
<br/><br/><label>ISBN: </label>0-03-043016-X 
<br/><br/><label>Source: </label>Books to be hide in OPAC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research Methods