Columbia subject headings:
Harvard subject headings:
Postcards--History--20th century--Themes, motives.
Postcards--Political aspects--History.
Propaganda in art--History.
Propaganda, Anti-Japanese--History.
Sino-Japanese War, 1937-1945--Propaganda
World War, 1914-1918--Propaganda
World War, 1939-1945--Propaganda.
Princeton subject headings:
Postcards--History--20th century--Themes, motives.
Postcards--Political aspects.
Propaganda in art.
Propaganda, Anti-Japanese.
Sino-Japanese War, 1937-1945--Propaganda.
World War, 1914-1918--Propaganda.
World War, 1939-1945--Propaganda.