Sellitz, Claire. <br/><br/>
Research methods in social relations / 
by Claire Slltiz. 
 - 3rd. ed. 
 - Chicago :  Holt, Rinehart and winston,  c1976. 
 - x, 624 p. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>003080986x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social  science --Research.
<br/><br/><label>LC Class. No.: </label>H62  / .R45