Columbia subject headings:
Animals--War use--History--20th century.
Armed Forces--Mascots--History--20th century.
World War, 1914-1918.
Harvard subject headings:
Animals--War use--History--20th century.
Armed Forces--Mascots--History--20th century.
World War, 1914-1918
Princeton subject headings:
Animals--War use--History--20th century.
Armed Forces--Mascots--History--20th century.
World War, 1914-1918.