Giorgio Sanguinetti, The Art of Partimento : History, Theory, and Practice. https://gettysburg.mrooms2.net/mod/url/view.php?id=613319 (requires Gettysburg College login)
The forty-eight preludes and fugues of John Sebastian Bach analysed for the use of students:
Outline analysis of each of J. S. Bach’s forty-eight fugues in the “Das wohltemperirte Clavier.”
Diminution resources – https://www.earlymusicsources.com/youtube/diminutions