Columbia subject headings:
Inca astronomy.
Incas--Social life and customs.
Indian astronomy--Andes Region.
Indians of South America--Andes Region--Social life and customs.
Harvard subject headings:
Inca astronomy.
Incas--Social life and customs
Indian astronomy--Andes Region.
Indians of South America--Andes Region--Social life and customs
Princeton subject headings:
Inca astronomy.
Inca calendar.
Incas--Social conditions.
Incas.
Indian astronomy--South America.