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SOURCES
NETHERSOLE, SCOTT. “Leonardo Da Vinci’s ‘St Anne’: Paris.” The Burlington Magazine, vol. 154, no. 1312, Burlington Magazine Publications Ltd., 2012, pp. 512–14, http://www.jstor.org/stable/23232800.
de Viguerie, L., Walter, P., Laval, E., Mottin, B. and Solé, V. (2010), Revealing the sfumato Technique of Leonardo da Vinci by X-Ray Fluorescence Spectroscopy.…