Columbia subject headings:
Harvard subject headings:
Delbrück, Hans, 1848-1929--Criticism and interpretation.
Military art and science--Germany--History--19th century.
Military art and science--Germany--History--20th century.
Military history--19th century.
Military history--20th century.
Military history--History--19th century.
Military history--History--20th century.
Strategy--History--19th century
Strategy--History--20th century
Princeton subject headings:
Delbrück, Hans, 1848-1929.
Military art and science--Germany--History--19th century.
Military art and science--Germany--History--20th century.
Military history--Historiography--History--19th century.
Military history--Historiography--History--20th century.
Strategy--History--19th century.
Strategy--History--20th century.