Columbia subject headings:
Crimea (Ukraine)--History--Russian occupation, 2014-
Russo-Ukrainian War, 2014---Chronology.
Harvard subject headings:
Crimea (Ukraine)--Annexation to Russia (Federation)
Crimea (Ukraine)--History--2014-
Crimea (Ukraine)--Politics and government.
Debalʹt︠s︡eve (Donet︠s︡ʹka oblast, Ukraine)--History, Military--21st century--Sources.
Donet︠s︡ʹka oblastʹ (Ukraine)--History, Military--21st century--Sources.
Russia (Federation)--Foreign relations--Ukraine.
Ukraine Conflict, 2014---History--Sources.
Princeton subject headings: