Columbia subject headings:
Arc measures.
Chile.
Colombia.
Earth (Planet)--Figure.
Peru.
Scientific expeditions.
South America.
Spain--Colonies--South America.
Harvard subject headings:
Princeton subject headings:
Arc measures--Early works to 1800.
Chile--Description and travel--Sources.
Colombia--Description and travel--Sources.
Incas--History--18th century--Sources.
Indians of South America--Andes Region--Early works to 1800.
Peru--Description and travel--Sources.
Peru--History--18th century--Sources.
Scientific expeditions--South America--18th century--Sources.
South America--Description and travel--Sources.
South America--Discovery and exploration--18th century--Sources.
Spain--Colonies--South America--Early works to 1800.
Spain--Exploring expeditions--18th century--Sources.