Columbia subject headings:
Art--Exhibitions.
Ricketts, Charles S., 1866-1931--Art collections--Exhibitions.
Shannon, Charles, 1863-1937--Art collections--Exhibitions.
Harvard subject headings:
Art--Exhibitions
Ricketts, Charles S., 1866-1931--Art collections--Exhibitions.
Shannon, Charles, 1863-1937--Art collections--Exhibitions.
Princeton subject headings:
Art--Exhibitions.
Ricketts, Charles S., 1866-1931--Art collections--Exhibitions.
Shannon, Charles, 1863-1937--Art collections--Exhibitions.