OFF/ON ON /OFF. 1977.

Eindhoven, Municipal Van Abbemuseum, 1977.
27 x 21cm, 64 pp plus card covers. Minimalist artist book - two black
parallel lines are posed in relation to a blue graph grid to create all of
the possibilities of off and on.  A very good copy  with minor grubbiness to
the card covers - from the edition of 750 copies.