Columbia subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Poland--Foreign relations--Russia (Federation)
Russia (Federation)--Foreign relations--Poland.
Russia (Federation)--Foreign relations--Ukraine.
Smolensk Air Disaster, 2010.
Ukraine--Foreign relations--Russia (Federation)
Harvard subject headings:
Aircraft accidents--Investigation--Poland.
Aircraft accidents--Russia (Federation)
Katyn Massacre, Katynʹ, Russia, 1940.
Poland--Politics and government--1989-
Putin, Vladimir Vladimirovich, 1952-
Russia (Federation)--History--1991-
Smolensk Air Disaster, 2010.
Ukraine--History--1991-
Princeton subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Poland--Foreign relations--Russia (Federation).
Russia (Federation)--Foreign relations--Poland.
Russia (Federation)--Foreign relations--Ukraine.
Smolensk Air Disaster, 2010.
Ukraine--Foreign relations--Russia (Federation).