Quaestio an Sanctus Hildefonsus, episcopus toletanus, Conceptae Virginis festum in Hispaniis instituerit - Ballerini, Antonio (S.I.) 1805-1881 (Romae Typis S. C. de Propaganda Fide, 1856)
Keywords: Ildefonso de Toledo, -- Santo -- m. 667; Inmaculada Concepción -- -Liturgia