The drawings of Leonardo da Vinci in the collection of Her Majesty the Queen at Windsor Castle
Leonardo,da Vinci,1452-1519.
Clark, Kenneth,1903-1983.
Pedretti, Carlo.
London Phaidon,
1969
Previous ed. published in 2vols as 'A catalogue of the drawings of Leonardo da Vinci in the collection of His Kajesty the King at Windsor Castle'. Cambridge: Cambridge U.P., 1935
bibl p.ix-xi
Leonardo, da Vinci, 1452-1519.