Columbia subject headings:
Harvard subject headings:
Art--Private collections--Poland--Łódź--Catalogs.
Art--Private collections--Switzerland--Rapperswil--Catalogs.
Jewish businesspeople--Poland--Łódź.
Muzeum Miasta Łodzi--Catalogs.
Muzeum Polskie w Rapperswilu--Catalogs.
Posen family.
Princeton subject headings:
Art--Private collections--Poland--Łódź--Catalogs.
Art--Private collections--Switzerland--Rapperswil--Catalogs.
Catalogs.
Jewish businesspeople--Poland--Łódź.
Muzeum Miasta Łodzi--Catalogs.
Muzeum Polskie w Rapperswilu--Catalogs.
Posen family.