Columbia subject headings:
Harvard subject headings:
United States--Armed Forces--History--20th century--Pictorial works.
United States--History, Military--20th century--Pictorial works.
United States. Army. American Expeditionary Forces--History--20th century--Pictorial works.
World War, 1914-1918--Battlefields--France--Pictorial works
World War, 1914-1918--United States--Pictorial works.
Princeton subject headings:
United States--Armed Forces--History--20th century--Pictorial works.
United States--History, Military--20th century--Pictorial works.
United States. Army. American Expeditionary Forces--History--20th century--Pictorial works.
World War, 1914-1918--Battlefields--France--Pictorial works.
World War, 1914-1918--United States--Pictorial works.