Columbia subject headings:
Merlin (Legendary character)--History and criticism.
Harvard subject headings:
Arthurian romances--Adaptations--Congresses.
Arthurian romances--Adaptations--History and criticism--Congresses.
Arthurian romances--History and criticism--Congresses.
Medievalism--Congresses.
Merlin (Legendary character)--Fiction--Congresses.
Merlin (Legendary character)--In literature--Congresses.
Merlin (Legendary character)--Romances--Adaptations--Congresses.
Merlin (Legendary character)--Romances--Adaptations--History and criticism--Congresses.
Merlin (Legendary character)--Romances--History and criticism--Congresses.
Middle Ages in literature--Congresses.
Wizards in literature--Congresses.
Women in literature--Congresses
Princeton subject headings:
Merlin (Legendary character)--Legends--History and criticism--Congresses.