Columbia subject headings:
Wielkopolska (Poland)--Economic conditions.
Wielkopolska (Poland)--Population.
Wielkopolska (Poland)--Rural conditions.
Wielkopolska (Poland)--Social conditions.
Harvard subject headings:
Rural population--Poland--Wielkopolska.
Wielkopolska (Poland)--Population, Rural.
Wielkopolska (Poland)--Rural conditions.
Princeton subject headings:
Rural development--Poland--Social aspects.
Rural population--Poland--Wielkopolska.
Wielkopolska (Poland)--Economic conditions.
Wielkopolska (Poland)--Rural conditions.
Wielkopolska (Poland)--Social conditions.