Columbia subject headings:
Brazil--Ethnic relations.
Jews--Brazil--History.
Wolff, Egon.
Wolff, Frieda.
Harvard subject headings:
Brazil--Ethnic relations.
Jews--Brazil--History.
Wolff, Egon.
Wolff, Frieda.
Princeton subject headings:
Brazil--Ethnic relations.
Jews--Brazil--History.
Wolff, Egon--Biography.
Wolff, Frieda--Biography.