Columbia subject headings:
Harvard subject headings:
Cost and standard of living--Germany (West)--Duisburg.
Foreign workers, Turkish--Germany (West)--Duisburg.
Return migration--Turkey.
Saving and investment--Germany (West)--Duisburg.
Princeton subject headings:
Cost and standard of living--Germany (West)--Duisburg.
Foreign workers, Turkish--Germany (West)--Duisburg.
Return migration--Turkey.
Saving and investment--Germany (West)--Duisburg.