Columbia subject headings:
Beckett, Samuel, 1906-1989--Criticism and interpretation.
Harvard subject headings:
Beckett, Samuel, 1906-1989--Archives.
Beckett, Samuel, 1906-1989--Criticism and interpretation.
University of Reading. Beckett Archive
Princeton subject headings:
Beckett, Samuel, 1906---Criticism and interpretation.
Beckett, Samuel, 1906---Manuscripts.