Columbia subject headings:
Harvard subject headings:
Piskorzów (Poland)--Description and travel.
Piskorzów (Poland)--History.
Silesia, Lower (Poland and Germany)--Description and travel.
Silesia, Lower (Poland and Germany)--History.
Princeton subject headings:
Piskorzów (Poland)--Description and travel.
Piskorzów (Poland)--History.
Silesia, Lower (Poland and Germany)--Description and travel.
Silesia, Lower (Poland and Germany)--History.