Columbia subject headings:
Pérez Galdós, Benito, 1843-1920. Doña Perfecta.
Pérez Galdós, Benito, 1843-1920. Fortunata y Jacinta.
Space and time in literature.
Harvard subject headings:
Pérez Galdós, Benito, 1843-1920. Fortunata y Jacinta
Pérez Galdós, Benito, 1843-1920. Doña Perfecta.
Space and time in literature.
Princeton subject headings:
Pérez Galdós, Benito, 1843-1920.