Methodology in social research / 
edited by Hubert M. Blalock, Jr. and Ann B. Blalock. 
 - New York :  McGraw-Hill,  1968. 
 - 493 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.<br/>Social sciences--Methodology.