Columbia subject headings:
Art, Irish--20th century--Catalogs.
O'Conor, Roderic, 1860-1940.
Harvard subject headings:
Artists--Ireland--Biography.
O'Conor, Roderic, 1860-1940--Catalogs.
O'Conor, Roderic, 1860-1940--Catalogues raisonnés.
O'Conor, Roderic, 1860-1940.
Princeton subject headings:
O'Conor, Roderic, 1860-1940--Catalogues raisonnés.
O'Conor, Roderic, 1860-1940.
Painters--Ireland--Biography.