Columbia subject headings:
Harvard subject headings:
Europe, Central--Relations--Europe, Western.
Europe, Eastern--Relations--Europe, Western.
Lithuania--Relations--Poland.
Lithuania. Treaties, etc. 1569.
Poland--Relations--Lithuania
Princeton subject headings:
Europe, Central--Relations--Europe, Western.
Europe, Eastern--Relations--Europe, Western.
Lithuania--Relations--Poland.
Lithuania. Treaties, etc. 1569
Poland--Relations--Lithuania.