Spector, Paul E. <br/><br/>
Research designs 

 - London  Sage Publishers  1981 
 - 80p. 
<br/><br/><label>ISBN: </label> RS 300.00 
<br/><br/><label>Source: </label> RS 300.00 
<br/><br/><label>Dewey Class. No.: </label>300.15195 SPE