Columbia subject headings:
Hadda, Wolfgang, 1920-
Jewish refugees--China--Shanghai--Biography.
Jews--Poland--Wrocław--Biography.
Harvard subject headings:
Hadda, Wolfgang, 1920-
Jewish refugees--China--Shanghai--Biography
Jews--Germany--History--1933-1945.
Jews--Poland--Wrocław--Biography.
Wrocław (Poland)--Ethnic relations.
Princeton subject headings:
Hadda, Wolfgang, 1920-
Jewish refugees--China--Shanghai--Biography.
Jews--Germany--Breslau--Biography.