Columbia subject headings:
Harvard subject headings:
France. Armée de terre--History.
Germany--History, Military--20th century.
Germany. Heer. Generalstab--History.
Military intelligence--Germany--History--20th century.
Military reconnaissance--History--20th century.
Russia (Federation). Vooruzhennye sily--History.
Princeton subject headings:
France. Armée de terre--History.
Germany--History, Military--20th century.
Germany. Heer. Generalstab--History.
Military intelligence--Germany--History--20th century.
Military reconnaissance--History--20th century.
Russia (Federation). Vooruzhennye sily--History.