VORMEN VAN DE KLEUR. New Shapes of Color. Amst., Stedelijk Mus., 1966. 8, (38) pp. W. 4 silkscreen prints by B. Bonies, Elsworth Kelly, G.-K. Pfahler & W. Turnbull (27x27 cm), & num. ills. 4°. Loose as issued in or. chemise & obrds. portfol. (Small tears in chemise & portfol., portfol. slightly rubbed).