Columbia subject headings:
Harvard subject headings:
Indians of Central America--Calendar.
Indians of Central America--Mathematics.
Indians of Mexico--Calendar.
Indians of Mexico--Mathematics.
Manuscripts, Maya.
Maya calendar.
Mayas--Mathematics
Princeton subject headings:
Indians of Central America--Calendar.
Indians of Central America--Mathematics.
Indians of Mexico--Calendar.
Indians of Mexico--Mathematics.
Manuscripts, Maya.
Maya calendar.
Mayas--Mathematics.