Columbia subject headings:
Harvard subject headings:
Linguistics--Research--Soviet Union.
Russian language--Grammar, Historical.
Russian language--Grammar--Outlines, syllabi, etc.
Russian language--Phonology, Historical.
Princeton subject headings:
Linguistics--Research--Russia.
Russian language--Grammar, Historical.
Russian language--Grammar--1950---Outlines, syllabi, etc.
Russian language--Phonology, Historical.