Columbia subject headings:
Ambrosiano.
Art--Themes, motives.
Bardi, P. M. (Pietro Maria), 1900-1999--Criticism and interpretation.
Harvard subject headings:
Ambrosiano.
Art--Themes, motives
Bardi, P. M. (Pietro Maria), 1900-1999--Criticism and interpretation.
Princeton subject headings:
Art critics--Italy--Biography.
Art--Collectors and collecting--Biography.
Art--Philosophy.
Bardi, P. M. (Pietro Maria), 1900-1999.