Undécima tesis. 

 - Río Piedras, P.R.  1973- 
 - volumes :  illustrations (black and white) ;  28 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marxism--Puerto Rico
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Periodicals.