Columbia subject headings:
Division of labor--Case studies.
Industrial sociology--Case studies.
Machinery in the workplace--United States--Case studies.
Working class--United States--Case studies.
Harvard subject headings:
Division of labor--Case studies.
Industrial sociology--Case studies.
Machinery in the workplace--United States--Case studies.
Working class--United States--Case studies.
Princeton subject headings:
Case studies.
Division of labor--Case studies.
Industrial sociology--Case studies.
Labor--United States--Case studies.
Machinery in the workplace--United States--Case studies.