Ecce video caelos apertos 19.2

Bibliography

Drake, George Warren James. 1972. The first printed book of motets, Petrucci's Motteti A numero trentatre (Venice 1502) and Motetti de Passione De cruce De sacramento De beata virgine et huius modi B (Venice 1503): A critical study and complete edition. Ph.D. Dissertation, University of Illinois. pp. (2), 59-62.

Miller, Clement A (ed.) 1965. Henricus Glarean. Dodecachordon. Musicological Studies and Documents.  Neuhausen nr. Stuttgart: American Institute of Musicology/Hänssler Verlag. pp. 404-406.