Columbia subject headings:
Cantar de mío Cid.
Spanish literature--To 1500--History and criticism.
Harvard subject headings:
Cantar de mío Cid.
Spanish literature--To 1500--History and criticism
Princeton subject headings:
Cantar de mío Cid--Language.
Cantar de mío Cid.
Cid, approximately 1043-1099--Romances--History and criticism.