Columbia subject headings:
Amish--Indiana--Economic conditions--Case studies.
Amish--Ohio--Economic conditions--Case studies.
Amish--Pennsylvania--Economic conditions--Case studies.
Indiana--Economic conditions.
Ohio--Economic conditions.
Pennsylvania--Economic conditions.
Harvard subject headings:
Amish--Indiana--Economic conditions--Case studies.
Amish--Ohio--Economic conditions--Case studies.
Amish--Pennsylvania--Economic conditions--Case studies.
Indiana--Economic conditions.
Ohio--Economic conditions.
Pennsylvania--Economic conditions
Princeton subject headings: