Langbein, Laura Irwin. <br/><br/>
Ecological inference / 
Laura Irwin Langbein, Allan J. Lichtman. 
 - Beverly Hills, Calif. :  Sage Publications,  c1978. 
 - 70 p. :  ill. ; 
 - A Sage university paper Quantitative applications in the social sciences ; ser. no. 07-010 .
<br/><br/>Bibliography: p. 68-70. 
<br/><br/><label>ISBN: </label>0803909411 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences<br/>Social sciences
<br/><br/><label>Dewey Class. No.: </label>300  / LAN