A-Wn-ms-Cod.1783: Title as in ms = 'Salve sancta parens' / Kyrie I: [Superius]: 'Salve sancta parens' (in red ink) / Double texted Agnus I-III
D-Ju-ms-22: Composer name in ms (index) = 'Petrus de [la] Rue' / Title as in ms (index) = 'de beata virgine' / Title as in ms = 'Debeata virgine' / Double texted Agnus I-III
V-CVbav-ms-Capp.Sist.41: Composer name in ms (index) = 'Perisson de la rue' / Composer name in ms (in painted initial) = 'P.DE.LA.RUE' / Title as in ms (index) = 'M[issa] de beata virgine' / [Tenor]: 'Benedictus tacet' / Double texted Agnus I-III
