Columbia subject headings:
Harvard subject headings:
Etching, English--20th century--Exhibitions.
Freud, Lucian--Exhibitions.
Portraits, British--20th century--Exhibitions.
Princeton subject headings:
Etching, English--Exhibitions--20th century.
Freud, Lucian--Criticism and interpretation.
Freud, Lucian--Exhibitions.
Portraits, British--Exhibitions--20th century.