Columbia subject headings:
Educators--Poland--Biography.
Jews--Poland--Biography.
Korczak, Janusz, 1878-1942--Friends and associates.
Korczak, Janusz, 1878-1942.
Ṿingarṭen, Yeraḥmiʼel, 1902-1982--Friends and associates.
Harvard subject headings:
Korczak, Janusz, 1878-1942
Princeton subject headings:
Educators--Poland--Biography.
Jews--Poland--Biography.
Korczak, Janusz, 1878-1942--Friends and associates.
Korczak, Janusz, 1878-1942.
Ṿingarṭen, Yeraḥmiʼel, 1902-1982--Friends and associates.