found: Carta abierta al director del Pueblo libre, 1901:last page of text (Rafael Serra)
found: OCLC, Nov. 26, 2001(hdg.: Serra Montalvo, Rafael, 1858-1909; usage: Rafael Serra) August 8, 2023 (usage: Rafael Serra [predom.]; R. Serra; Rafael Serra y Montalvo)
found: Racial migrations, 2021:text (Rafael Serra y Montalvo)
found: Wikipedia, August 8, 2023:Rafael Serra (full name José Rafael Simón Agapito Serra y Montalvo; born in Havana, March 24, 1858; died October 24, 1909; Afro-Cuban intellectual who played a large role in supporting the Cuban War of Independence; worked as a writer and editor for Spanish-language newspapers in the United States)