MÜLLER, F., Hrsg. Piet Zwart. - H.N. Werkman. - Einführung P.F. Althaus. (1966-67). 2 vols. Sm-4°. (Lvs. 2nd work a bit sticky). -- P. ZWART. Normalieënboekje. (Facs. ed.). (2000). Sm-4°. Owrps. -- SANDBERG. Vedova. Madrid, 1962. Owrps. (Front side a bit stained). Printed in 50 numb. copies. -- Id. Nu 2. (1967). 4°. Owrps. 'Kwadraat-Blad' printed in yellow, red & blue. Text in four languages. -- And 7 o. (12).