DeVillis, Robert F <br/><br/>
Scale development  theory and applications 

 - New Delhi  Sage publications  1991 
 - 121p.  22cm. PB. 
 - Applied social research methods series .
<br/><br/><label>ISBN: </label>080393776 
<br/><br/><label>Dewey Class. No.: </label>300.72  / DEV