Columbia subject headings:
German language--Study and teaching--Germany (West)--Polish speakers.
German language--Study and teaching--Germany (West)--Turkish speakers.
German language--Temporal constructions.
Harvard subject headings:
German language--Study and teaching (Elementary)--Foreign speakers--Longitudinal studies.
German language--Study and teaching--Polish speakers--Longitudinal studies.
German language--Study and teaching--Turkish speakers--Longitudinal studies.
German language--Tense.
Language acquisition--Longitudinal studies.
Second language acquisition--Longitudinal studies.
Princeton subject headings:
German language--Study and teaching--Germany (West)--Polish speakers.
German language--Study and teaching--Germany (West)--Turkish speakers.
German language--Temporal constructions.