Helena Chmura Kraemer <br/><br/>
How many subjects? :  Statistical power analysis in research / 
Helena Chmura Kraemer and Sue Thiemann. 
 - New Delhi :  Sage Publications,  1987. 
 - 120 p. :  illus.,  22 cm. 
<br/><br/><label>Dewey Class. No.: </label>001.422  / KRA N87H