Columbia subject headings:
Russia (Federation)--Foreign relations--Treaties.
Russia (Federation)--Foreign relations--Ukraine--Sources.
Ukraine--Foreign relations--1991-
Ukraine--Foreign relations--Russia (Federation)--Sources.
Ukraine--Foreign relations--Treaties.
Harvard subject headings:
Russia (Federation)--Foreign relations--Treaties.
Russia (Federation)--Foreign relations--Ukraine--Sources.
Ukraine--Foreign relations--1991-
Ukraine--Foreign relations--Russia (Federation)--Sources.
Ukraine--Foreign relations--Treaties.
Princeton subject headings: