Columbia subject headings:
Harvard subject headings:
Calakmul Site (Mexico)
Indians of Mexico--Languages--Writing
Indians of Mexico--Mexico--Campeche (State)--Antiquities.
Mayan languages--Writing
Mexico--Antiquities.
Princeton subject headings:
Calakmul Site (Mexico)
Indians of Mexico--Mexico--Campeche (State)--Kings and rulers.
Mayan languages--Writing.
Mayas--Kings and rulers.