75/ 525 Upright, D. Ellsworth Kelly. Works on paper. Introd. H. Geldzahler. New York, H.N. Abrams, 1987, V,(2),212p., num. (col.) ills., orig. pict. stiff wr., 4to. Sol LeWitt Wall Drawings 1968-1984. Amst. etc., Sted. Museum etc., 1984, 206,(1)p., num. (col.) ills., orig. wr., obl. 4to. - AND 6 others, i.a. C. GEELHAAR, Frank Stella. Working Drawings. Zeichnungen. 1956-1970 (Basel, 1980, col. ills., orig. pict. wr., sm. 4to) and DIAGRAMS AND DRAWINGS (Otterlo, exhib. cat. Rijksmuseum Kröller-Müller, 1972, textbooklet, 12 fold. sheets (each on 1 artist) w. loosely inserted plates, together in plastic sleeve, 4to).