Columbia subject headings:
Cowboys--Brazil, Northeast--Songs and music--History and criticism.
Folk music--Brazil, Northeast--History and criticism.
Folk songs, Portuguese--Brazil, Northeast--History and criticism.
Harvard subject headings:
Cowboys--Brazil, Northeast--Songs and music--History and criticism.
Folk music--Brazil, Northeast--History and criticism.
Folk music--Brazil--History and criticism
Folk songs, Portuguese--Brazil, Northeast--History and criticism.
Folk songs, Portuguese--Brazil--History and criticism
Princeton subject headings:
Cowboys--Brazil--Songs and music.
Folk music--Brazil.
Folk songs, Portuguese--Brazil.