Columbia subject headings:
Manuscripts, Mixtec--Congresses.
Manuscripts, Nahuatl--Congresses.
Harvard subject headings:
Indians of Mexico--History--Sources--Congresses.
Indians of Mexico--Languages--Writing--Congresses.
Manuscripts, Mexican (Pre-Columbian)--Congresses.
Manuscripts, Mexican--Congresses.
Manuscripts, Mixtec--Congresses.
Manuscripts, Nahuatl--Congresses.
Princeton subject headings:
Manuscripts, Mixtec--Congresses.
Manuscripts, Nahuatl--Congresses.