Siglum: 
D-WÜ/imp1583
Description: 

See Theodore Karp. “Some Notkerian Sequences in Germanic Print Culture of the Fifteenth and Sixteenth Centuries,” in Western Plainchant in the First Millennium, Studies in the Medieval Liturgy and its music, edd. S. Gallagher, J. Haar, J. Nadas, T. Striplin. 399-428. 2003