Columbia subject headings:
Gosudarstvennyĭ russkiĭ muzeĭ (Saint Petersburg, Russia)--Exhibitions.
Painters--Russia--20th century--Biography.
Painters--Russia--Exhibitions.
Painting, Russian--20th century--Exhibitions.
Roerich, Nicholas, 1874-1947--Exhibitions.
Harvard subject headings:
Roerich, Nicholas, 1874-1947--Exhibitions.
Princeton subject headings: