Columbia subject headings:
Harvard subject headings:
Chachapoyas (Peru : Province)--Antiquities.
Incas--Mathematics
Incas--Peru--Chachapoyas (Province)--Antiquities.
Laguna de los Condores Site (Peru)
Quipu--Peru--Chachapoyas (Province)
Princeton subject headings:
Chachapoyas (Peru : Province)--Antiquities.
Incas--Mathematics.
Incas--Peru--Chachapoyas (Province)--Antiquities.
Laguna de los Condores Site (Peru)
Quipu--Peru--Chachapoyas (Province).