Columbia subject headings:
Austria--History, Military--Congresses.
Austria--Relations--Poland--Congresses.
Poland--History, Military--Congresses.
Poland--Relations--Austria--Congresses.
Harvard subject headings:
Austria--History, Military--Congresses.
Austria--Relations--Poland--Congresses.
Poland--History, Military--Congresses.
Poland--Relations--Austria--Congresses.
Princeton subject headings: