Columbia subject headings:
Harvard subject headings:
Germany. Heer--Biography.
Nagel, Fritz, 1892-
Soldiers--Germany--Biography
World War, 1914-1918--Personal narratives, German
Princeton subject headings:
Germany. Heer--Biography.
Nagel, Fritz, 1892-
Soldiers--Germany--Biography.
World War, 1914-1918--Personal narratives, German.