Columbia subject headings:
Archaeoastronomy--Andes Region.
Indian astronomy--Peru.
Indians of South America--Peru--Antiquities.
Machu Picchu Site (Peru)
Harvard subject headings:
Princeton subject headings:
Archaeoastronomy--Andes Region.
Indian astronomy--Peru.
Indians of South America--Peru--Antiquities.
Machu Picchu Site (Peru)