Puerto Rican Socialist Party

Sources

• Hall-Hoag Collection of Dissenting and Extremist Printed Propaganda
• Wikipedia: http://en.wikipedia.org/wiki/Puerto_Rican_Socialist_Party
• Web: http://www.britannica.com/EBchecked/topic/482877/Puerto-Rican-Socialist-Party
• DbPedia: http://dbpedia.org/page/Puerto_Rican_Socialist_Party