Do not rely on a 30-year-old scan. Download the EASA AR-100 sample chapters from their official site. Compare them against your old Rosenberg PDF. You will quickly see why the world has moved on—and how you can bring the best of both eras into your repair shop.
If you are looking for a comprehensive textbook on this topic written by Robert Rosenberg, you are likely looking for his more famous trade manual: electric motor repair robert rosenberg pdf updated