Columbia subject headings:
Böll, Heinrich, 1917-1985.
Germany (West)--Race relations.
Turks--Germany (West)--Social conditions.
Harvard subject headings:
Böll, Heinrich, 1917-1985
Germany (West)--Race relations.
Turks--Germany (West)--Social conditions.
Princeton subject headings:
Böll, Heinrich, 1917-1985.
Germany (West)--Race relations.
Turks--Germany (West)--Social conditions.