Columbia subject headings:
Harvard subject headings:
Holocaust, Jewish (1939-1945)--Germany--Cologne.
Jewish businesspeople--Germany--Cologne--History--20th century.
Jewish families--Germany--Cologne.
Jews--Germany--Cologne--Biography.
Katz family.
Katz-Rosenthal (Cologne, Germany)
Rosenthal family.
Princeton subject headings:
Holocaust, Jewish (1939-1945)--Germany--Cologne.
Jewish businesspeople--Germany--Cologne--History--20th century.
Jewish families--Germany--Cologne.
Jews--Germany--Cologne--Biography.
Katz family.
Rosenthal family.