Columbia subject headings:
Pérez Galdós, Benito, 1843-1920--Characters--Men.
Pérez Galdós, Benito, 1843-1920--Characters--Older people.
Harvard subject headings:
Old age in literature
Pérez Galdós, Benito, 1843-1920--Characters--Men.
Pérez Galdós, Benito, 1843-1920--Characters--Older people.
Princeton subject headings:
Pérez Galdós, Benito, 1843-1920--Characters--Men.
Pérez Galdós, Benito, 1843-1920--Characters--Older people.