Columbia subject headings:
Fortification--Austria--History.
Fortification--Galicia (Poland and Ukraine)--History.
Galicia (Poland and Ukraine)--History.
Przemyśl (Poland)--History, Military.
Harvard subject headings:
Fortification--Austria--History.
Fortification--Galicia (Poland and Ukraine)--History.
Galicia (Poland and Ukraine)--History.
Przemyśl (Poland)--History, Military.
Przemyśl (Przemyśl, Poland)--History, Military.
Princeton subject headings:
Fortification--Austria--History.
Fortification--Galicia (Poland and Ukraine)--History.
Galicia (Poland and Ukraine)--History.
Przemyśl (Przemyśl, Poland)--History, Military.