Columbia subject headings:
Industries--Research--United States.
Material culture--Research--United States.
United States--Social life and customs.
Vernacular architecture--Research--United States.
Harvard subject headings:
Material culture--Research--United States.
United States--Social life and customs--Research.
Vernacular architecture--Research--United States.
Princeton subject headings:
Material culture--United States--Research.
United States--Social life and customs--Research.
Vernacular architecture--United States--Research.