Columbia subject headings:
Division of labor--Case studies.
Industrialization--United States--Case studies.
Labor supply--United States--Case studies.
Metropolitan areas--United States--Case studies.
Urbanization--United States--Case studies.
Harvard subject headings:
Division of labor--Case studies.
Industrialization--Case studies
Industrialization--United States--Case studies.
Labor supply--United States--Case studies.
Metropolitan areas--United States--Case studies.
Urbanization--United States--Case studies.
Princeton subject headings:
Division of labor--Case studies.
Industrialization--United States--Case studies.
Labor supply--United States--Case studies.
Metropolitan areas--United States--Case studies.
Urbanization--United States--Case studies.