Columbia subject headings:
World War, 1939-1945--Underground movements--Bosnia and Herzegovina--Ljubinje.
World War, 1939-1945--Underground movements--Popovo polje plain.
Harvard subject headings:
World War, 1939-1945--Underground movements--Bosnia and Herzegovina--Ljubinje.
World War, 1939-1945--Underground movements--Bosnia and Herzegovina--Popovo polje plain.
World War, 1939-1945--Underground movements--Popovo polje plain.
Princeton subject headings:
World War, 1939-1945--Underground movements--Bosnia and Herzegovina--Ljubinje.
World War, 1939-1945--Underground movements--Popovo polje plain.