Yoko Ono
Grapefruit: a book of instructions + drawings
introduction by John Lennon.
New York, NY : Simon & Schuster, 2000.
ISBN 9780743201100
“Thirty years ago, in 1962, I did an exhibition of instruction paintings at Sogetsu Art Center in Tokyo. A year before, I did a show of instruction paintings at AG Gallery in New York, but that was exhibiting canvases with instructions attached to them. Displaying just the instructions as paintings was going one step further, pushing visual art to its optimum conceptualism; it would open up a whole new horizon for the visual arts. I was totally excited by the idea and its visual possibilities. To make the point that the instructions were not themselves graphic images, I wanted the instructions to be typed.”
(From the book Yoko Ono: Instruction Paintings, 1995)
http://www.a-i-u.net/yokosays.html