Columbia subject headings:
Harvard subject headings:
Gothic Line (Italy)
Italy. Esercito--History World War, 1939-1945.
Pesaro e Urbino (Italy : Province)--History--Congresses.
World War, 1939-1945--Campaigns--Italy--Pesaro e Urbino (Province)--Congresses.
World War, 1939-1945--Underground movements--Italy--Pesaro e Urbino (Province)--Congresses.
Princeton subject headings:
World War, 1939-1945--Underground movements--Italy.