Methods of social research 
Bailey, Kenneth D. 
 - Third edition. 
 -  Macmillan Publishers.  1987 
 - 533 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71110436-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sociology -- Methodology.
<br/><br/><label>Dewey Class. No.: </label>GS 301.072 B15m 1987