Columbia subject headings:
World War, 1914-1918--Chronology--Periodicals.
World War, 1914-1918--Germany--Periodicals.
Harvard subject headings:
World War, 1914-1918--Chronology--Periodicals.
World War, 1914-1918--Germany--Periodicals.
Princeton subject headings:
Periodicals.
World War, 1914-1918--Chronology--Periodicals.
World War, 1914-1918--Germany--Periodicals.