Columbia subject headings:
Authors, Polish--20th century--Biography.
Educators--Poland--Warsaw--Biography.
Holocaust, Jewish (1939-1945)--Poland--Warsaw.
Jews--Poland--Warsaw--Biography.
Korczak, Janusz, 1878-1942.
Warsaw (Poland)--Biography.
Harvard subject headings:
Authors, Polish--20th century--Biography.
Educators--Poland--Warsaw--Biography.
Holocaust, Jewish (1939-1945)--Poland--Warsaw
Jews--Poland--Warsaw--Biography.
Korczak, Janusz, 1878-1942
Warsaw (Poland)--Biography.
Princeton subject headings:
Holocaust, Jewish (1939-1945)--Poland--Warsaw.
Jews--Persecutions--Poland--Warsaw.
Korczak, Janusz, 1878-1942--Biography.