Key, Mary R. and Key, Harold. 1953. Vocabulario mejicano de la Sierra de Zacapoaxtla, Puebla. Mexico: Instituto Lingüístico de Verano. 232pp.
@book{key1953, address = {Mexico}, author = {Key, Mary R. and Key, Harold}, pages = {232}, publisher = {Instituto Lingüístico de Verano}, title = {Vocabulario mejicano de la Sierra de Zacapoaxtla, Puebla}, year = {1953} }