Columbia subject headings:
Bertholet, Ferdinand M., 1952---Art collections--Exhibitions.
Erotic painting, Chinese--Exhibitions.
Harvard subject headings:
Bertholet, Ferdinand M., 1952---Art collections--Exhibitions.
Erotic painting, Chinese--Ming-Qing dynasties, 1368-1912--Exhibitions.
Painting--Private collections--Netherlands--Exhibitions.
Princeton subject headings:
Bertholet, Ferdinand M., 1952---Art collections--Exhibitions.
Erotic painting, Chinese--Exhibitions.