Piece ID is

PAssemezo / eiusdem toni per bdurum a Io. Bap. Besardo

in THESAURUS HARMONICUS DIVINI LAURENCINI ROMANI, NEC NON [...] Ad decennium.

GB-Lbl K.4.h.1

Start: Folio: 89vSystem: 1 View Image
Continuation: Folio: 90r View Image
Continuation: Folio: 90v View Image
Continuation: Folio: 91r View Image
Finish: Folio: 91v View Image

People associated with source:

Jean-Baptiste BesardComposer(Probable)