Columbia subject headings:
Fretter-Pico, Maximilian, 1892-1984.
Military art and science--Germany--History--20th century.
Harvard subject headings:
Fretter-Pico, Maximilian, 1892-1984.
Military art and science--Germany--History--20th century.
Princeton subject headings:
Fretter-Pico, Maximillian, 1892-1984.
Military art and science--Germany--History--20th century.