Columbia subject headings:
Sickert, Walter, 1860-1942--Exhibitions.
Whistler, James McNeill, 1834-1903--Exhibitions.
Harvard subject headings:
Sickert, Walter, 1860-1942--Exhibitions.
Whistler, James McNeill, 1834-1903--Exhibitions.
Princeton subject headings:
Sickert, Walter, 1860-1942--Exhibitions.
Whistler, James McNeill, 1834-1903--Exhibitions.