I interviewed my Dad.

Sources mentioned: Dad. Oral History. Hamel, Rainer Enrique. "Bilingual education for indigenous peoples in Mexico." Bilingual and Multilingual Education(2016): 1-13.Oxfam México. “Por mi raza hablará la desigualdad: Efectos de las características étnico-raciales en la desigualdad de oportunidades en México.”Yoshioka, Hirotoshi. "Indigenous language usage and maintenance patterns among indigenous people in the era of neoliberal multiculturalism in Mexico and Guatemala." Latin American Research Review (2010): 5-34.