Columbia subject headings:
Fortification--France--History.
Military architecture--France--History.
Séré de Rivières, Raymond Adolphe, 1815-1895.
Harvard subject headings:
Fortification--France--History--19th century.
Fortification--France--History--20th century.
Military architecture--France--History--19th century.
Military architecture--France--History--20th century.
Séré de Rivières, Raymond Adolphe, 1815-1895.
Princeton subject headings: