Columbia subject headings:
Harvard subject headings:
Language acquisition--Study and teaching--Europe.
Language acquisition--Study and teaching--Poland.
Language acquisition--Study and teaching.
Language and education.
Language and languages--Study and teaching
Multilingualism.
Princeton subject headings:
Language acquisition--Study and teaching--Europe.
Language acquisition--Study and teaching--Poland.
Language acquisition--Study and teaching.
Language and education.
Language and languages--Study and teaching.
Multilingualism.