Columbia subject headings:
Footwear industry--United States.
Hides and skins.
Leather industry and trade--United States.
Tanning.
Harvard subject headings:
Footwear industry--United States.
Leather industry and trade--United States.
Shoe industry--United States.
Tanning
Princeton subject headings:
Leather industry and trade--United States.
Shoes--Trade and manufacture--United States.
Tanning.