Columbia subject headings:
Industrialization--India--Palar Valley.
Leather industry and trade--Social aspects--India--Palar Valley.
Social change--India--Palar Valley.
Harvard subject headings:
Industrialization--Social aspects--India--Palar Valley.
Leather industry and trade--India--Palar Valley.
Palar Valley (India)--Social conditions.
Social change--India--Palar Valley.
Tamil Nadu (India)--Social conditions.
Princeton subject headings: