Columbia subject headings:
Journalism--Spain--20th century.
Popular literature--Spain--History and criticism.
Spanish literature--20th century--History and criticism.
Harvard subject headings:
Journalism--Spain--20th century.
Libro popular (Madrid, Spain)--Indexes.
Popular literature--Spain--History and criticism.
Spanish literature--20th century--History and criticism
Princeton subject headings:
Indexes.
Libro popular (Madrid, Spain)--Indexes.