Columbia subject headings:
Ashkenazim--Social life and customs--Congresses.
Ashkenazim--Social networks--History--Congresses.
Interpersonal relations--Jews--Europe--History--Congresses.
Jews--Europe--Social life and customs--Congresses.
Jews--Social networks--Europe--History--Congresses.
Harvard subject headings:
Ashkenazim--Social life and customs--Congresses.
Ashkenazim--Social networks--History--Congresses.
Interpersonal relations--Europe--History--Congresses.
Interpersonal relations--Jews--Europe--History--Congresses.
Jews--Europe--Social life and customs--Congresses.
Jews--Social networks--Europe--History--Congresses.
Princeton subject headings:
Ashkenazim--Social life and customs--History--Congresses.
Interpersonal relations--Jews--Europe--History--Congresses.
Jews--Europe--Social life and customs--History--Congresses.