Key, Harold and de Key, Mary Ritchie. 1953. Vocabulario Mejicana de la Sierra de Zacapoaxtla, Puebla. México, D. F.: Instituto Lingüístico de Verano.
@book{Key-and-Key-1953a,
address = {México, D. F.},
author = {Key, Harold and de Key, Mary Ritchie},
publisher = {Instituto Lingüístico de Verano},
title = {Vocabulario Mejicana de la Sierra de Zacapoaxtla, Puebla},
year = {1953},
iso_code = {azz},
olac_field = {typology; general_linguistics; syntax},
wals_code = {nsz}
}