Picasso, Pablo,  1881-1973. <br/><br/>
Picasso :  graphic works. translated by Lisbeth Gombrich.  [Vol.1],  1899-1955 / 
introduction and selection by Bernhard Geiser ; biography and documentation by Hans Bolliger 
 - London :  Thames and Hudson,  1966. 
<br/><br/> Originally published by Verlag Gerd Hatje, Stuttgart, 1955.