Educational psychology 
Cronbach, Lee J., c1978. 
 - third edition. 
 -  Harcourt Brace Jovanovich, Inc.  1978 
 - 238 pages. 
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<br/><br/><label>ISBN: </label>0-15-520886-1 
<br/><br/><label>Dewey Class. No.: </label>370.15 G63e 1978