Nadia Boulanger
He is perhaps better known today through his keyboard harmony exercises, "Recueil de basses et chants donnés" which was a favorite teaching tool of his pupil, the legendary pedagogue Nadia Boulanger, and subsequently many of her students including Narcis Bonet who has republished a selection of these exercises under the title "Paul Vidal, Nadia Boulanger: A Collection of Given Basses and Melodies".