Columbia subject headings:
Germany--Emigration and immigration--Economic aspects.
Germany--Foreign economic relations--Turkey.
Turkey--Emigration and immigration--Economic aspects.
Turkey--Foreign economic relations--Germany.
Harvard subject headings:
Germany--Emigration and immigration--Economic aspects.
Germany--Foreign economic relations--Turkey.
Turkey--Emigration and immigration--Economic aspects.
Turkey--Foreign economic relations--Germany.
Princeton subject headings:
Germany--Emigration and immigration--Economic aspects.
Germany--Foreign economic relations--Turkey.
Turkey--Emigration and immigration--Economic aspects.
Turkey--Foreign economic relations--Germany.