Finding the PDF is half the battle. Here is how to actually get better using them:
Pedron’s works, such as the Solfeggi parlati Setticlavio , are standard requirements for the "esame di compimento" (completion exam) in Italian conservatories. These exercises typically focus on: pedron solfeggi manoscritti pdf better
Conservatorio Statale di Musica, Giovanni Pierluigi da Palestrina - Overview of Pedron's Solfeggi Collections Finding the PDF is half the battle
These are not the original manuscripts, but they are better for reading, printing, and annotating. such as the Solfeggi parlati Setticlavio