Kidder, Louise, <br/><br/>
Research methods in social relations / 
Louise H. Kidder, Claire Selltiz. 
 - 4th edition. 
 - New York :  Holt, Rinehart and Winston,  1981. 
 - 483 pages ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.