Columbia subject headings:
Harvard subject headings:
Comedy plays
Drama
Entremés--19th century.
Entremés--20th century.
Essays.
Interludes (Drama)
Librettos.
Sainetes--Spain--19th century.
Sainetes--Spain--20th century.
Spanish drama (Comedy)--19th century.
Spanish drama (Comedy)--20th century.
Spanish drama--19th century.
Spanish drama--20th century.
Spanish essays--20th century.
Zarzuelas--19th century--Librettos.
Zarzuelas--20th century--Librettos.
Zarzuelas.
Princeton subject headings:
Spanish drama--20th century.