Columbia subject headings:
Bilingualism in children--Germany.
Day care centers--Germany.
Education, Bilingual--Germany.
Second language acquisition.
Sorbian languages--Acquisition.
Harvard subject headings:
Bilingualism in children.
Bilingualism--Germany.
Grammar, Comparative and general.
Language acquisition.
Rěčny centrum WITAJ.
Sorbian languages--Acquisition.
Princeton subject headings:
Bilingualism in children.
Bilingualism--Germany.
Grammar, Comparative and general.
Language acquisition.
Rěčny centrum WITAJ.
Sorbian languages--Acquisition.