Sellitz, C. <br/><br/>
Research methods in social relations 
by C. Sellitz 
 - 4th ed. 
 - New York  Rinehard and Winston  1981 
 - 483p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research methods<br/>Social sciences - Research
<br/><br/><label>Dewey Class. No.: </label>B084 Se48r/81