Lipsey, Mark W. <br/><br/>
Design sensitivity :  statistical power for experimental research 
Mark W. Lipsey 
 - Newbury Park :  SAGE Publications,  1990 
 - 207 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>0803930623 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social service--Statistical methods