Columbia subject headings:
Choirboys--Spain--Toledo.
Choirboys--Training of--Spain--Toledo.
Toledo (Spain)--Church history.
Harvard subject headings:
Choirboys--Spain--Toledo.
Choirboys--Training of--Spain--Toledo.
Church music--Spain--Toledo--16th century.
Toledo (Spain)--Church history.
Princeton subject headings:
Choirboys--Spain--Toledo.
Choirboys--Traning of--Spain--Toledo.
Church music--Spain--Toledo.--16th century.
Toledo (Spain)--Church history.