Columbia subject headings:
Polish periodicals--Poland--Masovia--History.
Polish periodicals--Poland--Warmia--History.
Publishers and publishing--Poland--Masovia--History.
Publishers and publishing--Poland--Warmia--History.
Harvard subject headings:
Books--Poland--Mazury (Region)--History.
Books--Poland--Warmia--History.
Mazury (Poland : Region)--Intellectual life.
Polish periodicals--Poland--Mazury (Region)
Polish periodicals--Poland--Warmia.
Warmia (Poland)--Intellectual life.
Princeton subject headings:
Polish periodicals--Poland--Masovia--History.
Polish periodicals--Poland--Warmia--History.
Publishers and publishing--Poland--Masovia--History.
Publishers and publishing--Poland--Warmia--History.