Columbia subject headings:
Bilingualism--Soviet Union.
Russian language--Lexicology.
Russian language--Study and teaching--Foreign speakers.
Russian language--Usage.
Harvard subject headings:
Bilingualism--Soviet Union.
Russian language--Lexicology.
Russian language--Study and teaching--Foreign speakers.
Russian language--Usage.
Princeton subject headings:
Bilingualism--Soviet Union.
Russian language--Lexicology.
Russian language--Study and teaching--Foreign speakers.
Russian language--Usage.