Columbia subject headings:
Russian language--Aspect.
Russian language--Semantics.
Russian language--Verb.
Harvard subject headings:
Russian language--Aspect--Congresses.
Russian language--Aspect.
Russian language--Grammatical categories--Congresses.
Russian language--Semantics--Congresses.
Russian language--Tense--Congresses.
Princeton subject headings:
Russian language--Aspect.
Russian language--Semantics.
Russian language--Verb.