Columbia subject headings:
Incas--Kings and rulers.
Incas--Mathematics.
Indians of South America--Peru--Tahuantinsuyo--Antiquities.
Indians of South America--Peru--Tahuantinsuyo--Mathematics.
Mathematical instruments--Peru--Tahuantinsuyo.
Peru--Antiquities.
Quipu--Peru--Tahuantinsuyo.
Tahuantinsuyo (Peru)--Antiquities.
Harvard subject headings:
Incas--Mathematics
Indians of South America--Peru--Tahuantinsuyo--Antiquities.
Indians of South America--Peru--Tahuantinsuyo--Mathematics.
Mathematical instruments--Peru--Tahuantinsuyo.
Peru--Antiquities.
Quipu--Peru--Tahuantinsuyo.
Tahuantinsuyo (Peru)--Antiquities.
Princeton subject headings:
Incas--Mathematics.
Indians of South America--Peru--Tahuantinsuyo--Antiquities.
Indians of South America--Peru--Tahuantinsuyo--Mathematics.
Mathematical instruments--Peru--Tahuantinsuyo.
Peru--Antiquities.
Quipu--Peru--Tahuantinsuyo.
Tahuantinsuyo (Peru)--Antiquities.