Columbia subject headings:
Mexico--Biography--Encyclopedias.
Mexico--Encyclopedias.
Mexico--Geography--Encyclopedias.
Mexico--History--Encyclopedias.
Harvard subject headings:
Mexico--Biography--Encyclopedias.
Mexico--Encyclopedias.
Mexico--Geography--Encyclopedias.
Mexico--History--Encyclopedias.
Princeton subject headings:
Mexico--Dictionaries and encyclopedias.