Columbia subject headings:
Harvard subject headings:
Chelmno (Concentration camp)
Concentration camps--Poland--Chełmno.
Jews--Persecutions--Poland.
Princeton subject headings:
Chelmno (Concentration camp)
Holocaust, Jewish (1939-1945)--Poland--Chełmno (Konin).
Jews--Persecutions--Poland.
Poland--Ethnic relations.