Columbia subject headings:
Food industry and trade--Case studies.
Food--Marketing--Case studies.
Grocery trade--Case studies.
Hours of labor--Case studies.
Harvard subject headings:
Food industry and trade--Case studies.
Food--Marketing--Case studies.
Grocery trade--Case studies.
Hours of labor--Case studies.
Princeton subject headings:
Case studies.
Food industry and trade--Case studies.
Food--Marketing--Case studies.
Grocery trade--Case studies.
Hours of labor--Case studies.