Columbia subject headings:
Freemasons--In literature.
Manners and customs.
Pérez Galdós, Benito, 1843-1920--Knowledge and learning.
Pérez Galdós, Benito, 1843-1920. Episodios nacionales (Alianza Editorial)
Harvard subject headings:
Freemasonry in literature.
Pérez Galdós, Benito, 1843-1920--Knowledge--Manners and customs.
Pérez Galdós, Benito, 1843-1920. Episodios nacionales
Princeton subject headings:
Freemasons in literature.
Pérez Galdós, Benito, 1843-1920. Episodios nacionales (Alianza Editorial)