Erazo, Carlos <br/><br/>
El régimen de la libreta ;  la historia olvidada, 1849-1873 / 
Carlos Erazo. 
 - 1a ed. 
 - [Bayamón, P.R. :  s.n.],  c2006. 
 - 242 p.  ill.  23 cm. 
<br/><br/><label>ISBN: </label>0975975730 9780975975732 
<br/><br/><label>LCCN: </label>2006900017 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slavery--History.--Puerto Rico<br/>Agricultural laborers--History--Puerto Rico<br/>Social classes--History.--Puerto Rico<br/>Working class--History.--Puerto Rico<br/>Marginality, Social--Puerto Rico.<br/>Slave trade--History--Puerto Rico--19th century.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--History--19th century.