Tumin, Melvin Marvin <br/><br/>
Social class and social change in Puerto Rico 
Melvin M. Tumin with Arnold S. Feldman. 
 - Princeton, N.J.  Princeton University Press  1961. 
 - xxvi, 549 p.  tables. 
 - University of Puerto Rico. College of Social Sciences. A Social Sciences Research Center Study .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social classes--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Social conditions.