Singing with angels : liturgy, music, and art in the gradual of Gisela von Kersenbroeck /
Oliver, Judith(Judith H.)
Turnhout : Brepols,
c2007.
Includes bibliographical references (p. 315-332) and indexes.
Graduals (Liturgical books)
Illumination of books and manuscripts, German
Illumination of books and manuscripts, Medieval
Cistercian nuns