Ildefonso Schuster

• The Sacramentary : Vol. 4
• Historical notes on St. Benedict's Rule for monks
• La Basilica e Monastero di S. Paolo fuori le Mura
• Sacramentary : Vol. 1
• Sacramentary : Vol. 2
• Sacramentary : Vol. 3
• Sacramentary : Vol. 5
• The sacramentary (Liber sacramentorum)