Columbia subject headings:
Harvard subject headings:
Missing in action
Missing persons--Investigation--Italy.
Missing persons--Italy--Trentino-Alto Adige.
Wisner, William O., -1944?
World War, 1939-1945--Aerial operations, American
World War, 1939-1945--Missing in action--United States.
Princeton subject headings:
Wisner, William O., -1944?
World War, 1939-1945--Aerial operations, American.
World War, 1939-1945--Missing in action--United States.