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

 - London  Sage Publications UK       1981 
 - 80p.  cm. 
<br/><br/><label>Standard No.: </label>236,035 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>#, M1-;1