Columbia subject headings:
Codax, Martín, active approximately 1230. Sete cantigas de amor.
Love songs--Portugal.
Portuguese poetry--To 1500.
Harvard subject headings:
Codax, Martín, active approximately 1230--Criticism and interpretation.
Music--500-1400--Performance.
Troubadour songs--History and criticism.
Princeton subject headings:
Codax, Martín, active approximately 1230. Cantigas de amigo.
Portuguese poetry--To 1500--History and criticism.
Songs, Galician--500-1400--History and criticism.