Columbia subject headings:
Drama--20th century--Dictionaries.
Performing arts--Biography--Dictionaries.
Performing arts--Dictionaries.
Theater--Biography--Dictionaries.
Theater--Dictionaries.
Harvard subject headings:
Drama--20th century--Dictionaries.
Drama--Encyclopedias.
Performing arts--Biography--Dictionaries.
Performing arts--Dictionaries.
Theater--20th century.
Theater--Biography--Dictionaries.
Theater--Dictionaries.
Theater--Encyclopedias.
Princeton subject headings: