Columbia subject headings:
Calderón de la Barca, Pedro, 1600-1681.
Comparative literature--English and Spanish.
Comparative literature--Spanish and English.
Folk songs, Spanish.
Shelley, Percy Bysshe, 1792-1822.
Wordsworth, William, 1770-1850.
Harvard subject headings:
Comparative literature--English and Spanish.
Comparative literature--Spanish and English.
Princeton subject headings: