Describir: Leonardo da Vinci master draftsman / edited by Carmen C. Bambach with contributions by Carmen C. Bambach, Alessandro Cecchi, Claire Farago, Varena Forcione, Martin Kemp, Anne-Marie Logan, Pietro C. Marani, Carlo Pedretti, Carlo Vecce, Françoise Viatte, and Linda Wolk-Simon ; with the assistance of Rachel Stern and Alison Manges