Columbia subject headings:
Russian language--Grammar, Comparative--Ukrainian.
Russian language--Negation.
Ukrainian language--Grammar, Comparative--Russian.
Ukrainian language--Negation.
Harvard subject headings:
Russian language--Grammar, Comparative--Ukrainian.
Russian language--Negation.
Russian language--Negatives.
Ukrainian language--Grammar, Comparative--Russian.
Ukrainian language--Negation.
Ukrainian language--Negatives
Princeton subject headings:
Russian language--Grammar, Comparative--Ukrainian.
Russian language--Negation.
Ukrainian language--Grammar, Comparative--Russian.
Ukrainian language--Negation.