Key Variables in Social investigation 

 - London:  Routledge and Kegan Paul,  1986. 
 - 276p.;  21cm 
<br/><br/><label>ISBN: </label>0710206216 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Interaction
<br/><br/><label>Dewey Class. No.: </label>302  / KEY