Columbia subject headings:
Cid, approximately 1043-1099--In literature.
Comparative literature--Themes, motives.
Spanish literature--Themes, motives.
Harvard subject headings:
Cid, approximately 1043-1099--In literature.
Comparative literature--Themes, motives.
Spanish literature--Themes, motives.
Princeton subject headings:
Cid, approximately 1043-1099--Romances--History and criticism.
Comparative literature--Themes, motives.
Spanish literature--Themes, motives.