Columbia subject headings:
America--Languages.
Evolutionary genetics.
Human evolution.
Human population genetics--History.
Harvard subject headings:
America--Languages--History.
America--Languages.
Evolutionary genetics.
Human evolution.
Human genetics--Variation.
Human population genetics--History.
Indians--Languages
Language and languages--Origin
Princeton subject headings:
America--Languages--History.
Anthropoligical linguistics--America.
Human population genetics--America.
Indians--Languages--History.