LeWITT, Sol. Four Basic Colours: Yellow, Black, Red, Blue and their Combinations.

(London): Lisson Publications, 1971.  First edition.  Small square quarto.  Unpaginated.  Artist’s book featuring coloured line drawings that illustrate a distinct combinatory system of four colours (yellow, black, red, blue).A near fine copy in stapled wrappers.  Scarce.