Columbia subject headings:
Harvard subject headings:
Chełm Region (Poland : Voivodeship)--History.
Poland--History--To 1795
Soviet Union, Western--History.
Ukraine--History--To 1648.
Princeton subject headings:
Chełm Region (Poland : Voivodeship)--History.
Poland--History--To 1795.
Russia--History.
Ukraine--History--To 1648.