Kraemer, Helena Chmura. <br/><br/>
How many subjects?  statistical power analysis in research 
Helena Chmura Kraemer and Sue Themann foreword by Victor H. Denenberg. 
 - Newbury Park :  SAGE Publications,  1987. 
 - 120 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0803929498 
<br/><br/><label>LCCN: </label>87-16575 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research--Statistical methods.