Columbia subject headings:
Harvard subject headings:
German language--Errors of usage.
Language and languages--Study and teaching--Error analysis
Sociolinguistics--Germany (West)
Turkish language--Errors of usage.
Princeton subject headings:
Bilingualism in children--Germany (West).
Children--Language.
German language--Study and teaching--Germany (West)--Foreign speakers.
Turkish language--Study and teaching--Germany (West).
Turkish students--Germany (West).