Columbia subject headings:
City and town life--California--Oakland Metropolitan Area.
City and town life--California--San Francisco Metropolitan Area.
Informal sector (Economics)--California--Oakland Metropolitan Area.
Informal sector (Economics)--California--San Francisco Metropolitan Area.
Sociology, Urban--California--Oakland Metropolitan Area.
Sociology, Urban--California--San Francisco Metropolitan Area.
Harvard subject headings:
City and town life--California--Oakland Metropolitan Area.
City and town life--California--San Francisco Metropolitan Area.
Informal sector (Economics)--California--Oakland Metropolitan Area.
Informal sector (Economics)--California--San Franciso Metropolitan Area.
Sociology, Urban--California--Oakland Metropolitan Area.
Sociology, Urban--California--San Francisco Metropolitan Area.
Princeton subject headings: