Columbia subject headings:
Politeness (Linguistics)--Slavic countries.
Slavic languages--Grammar, Comparative.
Slavic languages--Honorific.
Slavic languages--Imperative.
Harvard subject headings:
Grammar, Comparative and general--Imperative.
Politeness (Linguistics)
Slavic languages--Grammar.
Princeton subject headings:
Politeness (Linguistics)--Slavic countries.
Slavic languages--Grammar, Comparative.
Slavic languages--Honorific.
Slavic languages--Imperative.