Columbia subject headings:
Dramatists, English--20th century--Biography--Dictionaries.
English drama--20th century--Bio-bibliography.
Harvard subject headings:
Dramatists, English--20th century--Biography--Dictionaries.
English drama--20th century--Bio-bibliography--Dictionaries.
English drama--20th century--Bio-bibliography.
Reference works.
Princeton subject headings:
Dramatists, English--20th century--Biography--Dictionaries.
English drama--20th century--Bio-bibliography.