B. Geiser. Picasso Peintre-Graveur. Berne: B. Geiser, 1955, reproductions, from the edition of 900 (there were 500 in the edition of 1933), and Georges Bloch, Catalogue of the printed graphic Work 1904-71, vols I, II and IV; Quarante Dessins de Picasso en marge du Buffon. (2); and three other volumes relating to Picasso(9)