Columbia subject headings:
Chariots--History.
Indo-European antiquities.
Indo-European languages.
Linguistic paleontology.
Harvard subject headings:
Chariots--History.
Indo-European antiquities.
Indo-European languages.
Linguistic paleontology.
Princeton subject headings:
Chariots--History.
Horses--History.
Indo-European antiquities.
Indo-European languages.
Linguistic paleontology.
Proto-Indo-European language.