Ballet Nacional de México (Autor/Nombre Corporativo)

Northwestern University Libraries, Berkeley Folk Music Festival archive, 1957-1970 flyer recto (Ballet Nacional de Mexico, Guillermina Bravo, artistic director; performed October 12 (year not given) at Oakland Auditorium)

Galeon.com, April 9, 2019 (Ballet Nacional de México; founded 1948 by Guillermina Bravo, dissolved 2006)