Bulmer, Martin, ed <br/><br/>
Sociological research methods: an introduction 

 - 2nd ed. 
 - London  Macmillan  1984 
 - xi, 351 p. 
<br/><br/><label>ISBN: </label> POU20 
<br/><br/><label>Dewey Class. No.: </label>301.072 B877S