Columbia subject headings:
Portuguese poetry--To 1500--History and criticism--Congresses.
Spanish poetry--To 1500--History and criticism--Congresses.
Harvard subject headings:
Ballads, Spanish--History and criticism.
Galician poetry--To 1500--History and criticism.
Portuguese poetry--To 1500--History and criticism.
Spanish literature--To 1500--History and criticism
Princeton subject headings:
Ballads, Spanish--History and criticism.
Galician poetry--To 1500--History and criticism.
Portuguese poetry--To 1500--History and criticism.
Spanish literature--To 1500--History and criticism.