Fundamentals statistics for psychology 
McCall, Robert B. 
 - Second edition. 
 -  Harcourt Brace Jovanovich, Inc.  1975 
 - 406 pages. 
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<br/><br/><label>ISBN: </label>0-15-529413-X 
<br/><br/><label>Dewey Class. No.: </label>310.1 Mc13f 1975