SANDBERG, W. Vijftien tekens. Fifteen signs. Hilv., Steendrukkerij De Jong, (1972) W. title-leaf & 15 plates after design by W. Sandberg. Fol. In or. plain stiff paper portfolio. Printed in a limited edition on the occasion of the 75th birthday of Willem Sandberg. -- Id. Experimenta typografica 2: Mens sana in corpore sano/Gesundheit. (1969). Owrps. -- Id. Experimenta typografica 11: tektonikê/das Konstruktive. (1956). Owrps. (Wrps. slightly stained/browned). -- A. PETERSEN & P. BRATTINGA. Sandberg. Een documentaire. 1975. 4°. Owrps. -- (4).