Columbia subject headings:
Sierra Norte (Oaxaca, Mexico)--Emigration and immigration--Social aspects.
Sierra Norte (Oaxaca, Mexico)--Politics and government.
Sierra Norte (Oaxaca, Mexico)--Social conditions.
Zapotec Indians--Mexico--Sierra Norte (Oaxaca)--Migrations.
Harvard subject headings:
Sierra Norte (Oaxaca, Mexico)--Emigration and immigration--Social aspects.
Sierra Norte (Oaxaca, Mexico)--Politics and government.
Sierra Norte (Oaxaca, Mexico)--Social conditions.
Zapotec Indians--Mexico--Sierra Norte (Oaxaca)--Migrations.
Princeton subject headings:
Sierra Norte (Oaxaca, Mexico)--Emigration and immigration--Social aspects.
Sierra Norte (Oaxaca, Mexico)--Politics and government.
Sierra Norte (Oaxaca, Mexico)--Social conditions.
Zapotec Indians--Mexico--Sierra Norte (Oaxaca)--Migrations.