Allerseelen : Studien zu Liturgie und Brauchtum eines Totengedenktages in der abendländischen Kirche
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The Liturgy of the Hours in East and West: the origins of the divine office and its meaning for today
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Daily prayer in Christian Spain : a study of the Mozarabic Office
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Divina officia : Liturgie und Frömmigkeit im Mittelalter
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Daily prayer in the early church : a study of the origin and early development of the divine office
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The St. Albans psalter : an Anglo-Norman song of faith
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The Queen Mary Psalter: a study of affect and audience
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El breviario de Martín el Humano : un códice de lujo para el Monasterio de Poblet
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The breviary through the centuries
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The Master of the Breviary of Jean Sans Peur and the Limbourgs.