| Anonimo Gaddiani", elaborating on Libro di Antonio Billi, 1537—1542• The Drawings of Leonardo da Vinci | Broek van den, Marc 2019 |
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| Drawings from New York Collections I: The Italian Renaissance | Scala Books, distributed by the Two Contients Publishing Group, |
With Translations, Emendations and a Biographical Introduction.
20| "The Mind of Leonardo da Vinci, Part 1" | Leonardo da Vinci Spirits of Invention - A Search for Traces |
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| Windsor Castle, Royal Library, sheets RL 19073v—74v and RL 19102 | Leonardo on the Human Body: The Anatomical, Physiological, and Embryological Drawings of Leonardo da Vinci |
Jaypee Brothers Medical Publishers P Ltd.