Columbia subject headings:
Jews--Germany--Mainz (Rhineland-Palatinate)--History--Congresses.
Mainz (Rhineland-Palatinate, Germany)--Ethnic relations--Congresses.
Harvard subject headings:
Jews--Germany--Mainz (Rhineland-Palatinate)--History--Congresses.
Mainz (Rhineland-Palatinate, Germany)--Ethnic relations--Congresses.
Princeton subject headings:
Jews--Germany (West)--Mainz--History.