Columbia subject headings:
Harvard subject headings:
Foreign workers, Turkish--History--20th century.
Rural-urban migration--Turkey--History--20th century.
Turkey--Economic conditions--1918-1960.
Turkey--Economic conditions--1960-
Turkey--Emigration and immigration--History--20th century.
Princeton subject headings:
Foreign workers, Turkish.
Turkey--Economic conditions--1918-1960.
Turkey--Emigration and immigration.