Columbia subject headings:
Aircraft accidents--Russia (Federation)--Smolensk.
Poland--Politics and government--1989-
Smolensk Air Disaster, 2010.
Harvard subject headings:
Aircraft accidents--Russia (Federation)--Smolensk.
Grief--Political aspects--Poland.
Poland--Politics and government--1989-
Princeton subject headings:
Aircraft accidents--Russia (Federation)--Smolensk.
Poland--Politics and government--1989-
Smolensk Air Disaster, 2010.