López Ugalde, R., and M. G. Hernández García. “The National Ethnography Program of the Indigenous Regions of Mexico and Critical Reflection on the Concept of Region”. Diario De Campo, no. 8-9, Oct. 2021, p. 246 a 256, https://revistas.inah.gob.mx/index.php/diariodecampo/article/view/17235.