Columbia subject headings:
Madrid (Spain)--Description and travel.
Pérez Galdós, Benito, 1843-1920--Criticism and interpretation.
Pérez Galdós, Benito, 1843-1920--Homes and haunts--Spain--Madrid.
Harvard subject headings:
Pérez Galdós, Benito, 1843-1920--Criticism and interpretation.
Princeton subject headings:
Pérez Galdós, Benito, 1843-1920--Criticism and interpretation.