Columbia subject headings:
Bell of Pennsylvania--Public relations--Case studies.
Inner cities--Pennsylvania--Philadelphia--Case studies.
Harvard subject headings:
Bell of Pennsylvania--Public relations--Case studies.
Community development, Urban--Pennsylvania--Philadelphia--Case studies.
Inner cities--Pennsylvania--Philadelphia--Case studies.
Princeton subject headings:
Bell of Pennsylvania--Public relations--Case studies.
Community development, Urban--Pennsylvania--Philadelphia--Case studies.
Inner cities--Pennsylvania--Philadelphia--Case studies.