Columbia subject headings:
World War, 1939-1945--Underground movements--Belarus.
World War, 1939-1945--Underground movements--Lithuania.
World War, 1939-1945--Underground movements--Poland.
World War, 1939-1945--Underground movements--Ukraine.
Harvard subject headings:
Poland--History--Occupation, 1939-1945
Soviet Union--History--German occupation, 1941-1944.
World War, 1939-1945--Poland.
World War, 1939-1945--Underground movements--Soviet Union.
Princeton subject headings:
World War, 1939-1945--Underground movements--Belarus.
World War, 1939-1945--Underground movements--Lithuania.
World War, 1939-1945--Underground movements--Poland.
World War, 1939-1945--Underground movements--Ukraine.