Columbia subject headings:
Ildephonsus, Saint, approximately 610-667.
Ildephonsus, Saint, approximately 610-667. De virgenitate Beatae Mariae.
Mary, Blessed Virgin, Saint--Virginity.
Harvard subject headings:
Ildephonsus, Saint, approximately 610-667.
Martínez de Toledo, Alfonso, 1398?-1466.
Princeton subject headings:
Ildephonsus, Saint, approximately 610-667.
Ildephonsus, Saint, approximately 610-667. De virgenitate Beatae Mariae.
Mary, Blessed Virgin, Saint--Virginity.