Columbia subject headings:
World War, 1914-1918--Personal narratives.
World War, 1914-1918--Pictorial works.
Harvard subject headings:
Orpen, William, Sir, 1878-1931
World War, 1914-1918--France--Personal narratives, English.
World War, 1914-1918--France--Pictorial works.
Princeton subject headings:
Personal narratives.
World War, 1914-1918--Personal narratives.
World War, 1914-1918--Pictorial works.