Columbia subject headings:
Harvard subject headings:
Gymnasium Adolfinum--Anniversaries, etc.
Gymnasium Adolfinum--History.
Moers (Germany)--Biography.
Moers (Germany)--History.
Princeton subject headings:
Gymnasium Adolfinum--Anniversaries, etc.
Gymnasium Adolfinum--History.
Moers (Germany)--Biography.
Moers (Germany)--History.