Columbia subject headings:
Art, Modern--Private collections--Poland--Olsztyn (Województwo Warmińsko-Mazurskie)--Exhibitions.
Art, Polish--Private collections--Poland--Olsztyn (Województwo Warmińsko-Mazurskie)--Exhibitions.
Pilecka, Maria--Art collections--Exhibitions.
Pilecki, Marek--Art collections--Exhibitions.
Harvard subject headings:
Art--Private collections--Poland--Exhibitions.
Pilecka, Maria--Art collections--Exhibitions.
Pilecki, Mark--Art collections--Exhibitions.
Princeton subject headings:
Art, Modern--Private collections--Poland--Olsztyn (Województwo Warmińsko-Mazurskie)--Exhibitions.
Art, Polish--Private collections--Poland--Olsztyn (Województwo Warmińsko-Mazurskie)--Exhibitions.
Pilecka, Maria--Art collections--Exhibitions.
Pilecki, Marek--Art collections--Exhibitions.