Cohen, Jacob. <br/><br/>
Statistical power analysis for the behavioral sciences   
by Jacob Cohen 
 - New York  Academic Press  1969 
 - xv, 415p.  incl. bibl., ind. 
<br/><br/><label>LCCN: </label>79-84152 
<br/><br/><label>Dewey Class. No.: </label>150.1943  / N691;1