Urbina was executed by General Fierro under the accusation that he betrayed Pancho Villa during the Battle of El Ébano (Spanish: Batalla de El Ébano), a 72-day siege of the town of El Ébano in the state of San Luis Potosí, where Urbina finally surrendered his forces to the Constitutionalist faction, and allegedly received a sum of money for his surrender.
Urbina is a major character in the novel, The Friends of Pancho Villa (1996), by James Carlos Blake.
- Eva Tessler. Encyclopedia of Mexico: History, Society & Culture. Routledge. Retrieved 2010-03-27.
- Katz, Friedrich (1998). The Life and Times of Pancho Villa. Stanford University Press. pp. 221, 269–272, 328–329. ISBN 0-8047-3046-6.
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