Columbia subject headings:
Bibliography--Poland--History.
Books--Poland--History.
Libraries--Poland--History.
Printing--Poland--History.
Harvard subject headings:
Bibliography--Poland--History.
Books--Poland--History
Libraries--Poland--History.
Printing--Poland--History
Princeton subject headings:
Archives--Poland.
Bibliography--Poland.
Books--Poland--History.
Libraries--Poland.
Printing--Poland--History.