Columbia subject headings:
Shepard, Sam, 1943-2017--Criticism and interpretation.
Shepard, Sam, 1943-2017--Stage history.
Harvard subject headings:
English drama--20th century
Shepard, Sam, 1943-2017--Criticism and interpretation.
Shepard, Sam, 1943-2017--Stage history.
Princeton subject headings:
Shepard, Sam, 1943-2017--Criticism and interpretation.
Shepard, Sam, 1943-2017--Stage history.