Columbia subject headings:
Harvard subject headings:
Animal welfare--History--20th century--Pictorial works.
Animal welfare--History--20th century.
Donkeys--War use--History--20th century--Pictorial works.
Donkeys--War use--History--20th century.
War horses--History--20th century--Pictorial works.
War horses--History--20th century.
World War, 1914-1918--Cavalry operations--Pictorial works.
World War, 1914-1918--Cavalry operations.
Princeton subject headings:
Animal welfare--History--20th century--Pictorial works.
Animal welfare--History--20th century.
Donkeys--War use--History--20th century--Pictorial works.
Donkeys--War use--History--20th century.
War horses--History--20th century--Pictorial works.
War horses--History--20th century.
World War, 1914-1918--Cavalry operations--Pictorial works.
World War, 1914-1918--Cavalry operations.