Columbia subject headings:
Sironi, Mario, 1885-1961--Exhibitions.
Soffici, Ardengo, 1879-1964--Exhibitions.
Harvard subject headings:
Sironi, Mario, 1885-1961--Exhibitions.
Soffici, Ardengo, 1879-1964--Exhibitions.
Princeton subject headings:
Sironi, Mario, 1885-1961--Exhibitions.
Soffici, Ardengo, 1879-1964--Exhibitions.