Columbia subject headings:
Ballads, Portuguese--History and criticism.
Ballads, Portuguese.
Romances, Portuguese--History and criticism.
Romances, Portuguese.
Harvard subject headings:
Ballads, Portuguese--Brazil.
Ballads, Portuguese--Portugal.
Brazilians--Music.
Folk music--Brazil
Folk music--Portugal
Folk poetry, Brazilian.
Folk poetry, Portuguese.
Folk songs, Portuguese--Brazil.
Folk songs, Portuguese--Portugal.
Portuguese--Music.
Princeton subject headings:
Ballads, Portuguese--Brazil.
Ballads, Portuguese--Portugal.
Brazilians--Music.
Folk music--Brazil.
Folk music--Portugal.
Folk poetry, Brazilian.
Folk poetry, Portuguese.
Folk songs, Portuguese--Brazil.
Folk songs, Portuguese--Portugal.
Portuguese--Music.