Columbia subject headings:
Harvard subject headings:
Demography--Congresses.
Jews--History--Congresses.
Jews--Migrations--Congresses.
Jews--Population--Congresses.
Jews--Social conditions--Congresses.
Jews--Statistics--Congresses.
Schmelz, U. O. (Usiel Oskar)
Schmelz, U. O. (Usiel Oskar)--Bibliography.
Princeton subject headings:
Jews--Social conditions--Congresses.