Columbia subject headings:
Fortification in art.
Fortification--Texas--History.
Salvant, J. U. (Joan Usner), 1932-
Harvard subject headings:
Fortification in art.
Fortification--Texas--History.
Fortification--Texas--Pictorial works.
Historic buildings--Texas--History.
Historic buildings--Texas--Pictorial works.
Military architecture--Texas.
Salvant, J. U. (Joan Usner), 1932-
Princeton subject headings:
Fortification in art.
Fortification--Texas--History.
Salvant, J. U. (Joan Usner), 1932-