David J. Burn & Stefan Gasch - Heinrich Isaac and Plyphony for the Properof the Mass in the Late Middle Ages and Renaissance ( Brepols Publishers ) 2011

 https://vdoc.pub/

https://vdoc.pub/download/heinrich-isaac-and-polyphony-for-the-proper-of-the-mass-in-the-late-middle-ages-and-the-renaissance-7hgcs1gcl9t0