OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Henry Moore to Gilbert & George : modern British art from the Tate Gallery: [catalogue of an exhibition held at the] Palais des Beaux-Arts, Brussels, 28 September-17 November 1973 by Tate Gallery. ISBN 0900874678. Published by Tate Gallery Publications in 1973. Publication and catalogue information, links to buy online and reader comments.
![Henry Moore to Gilbert & George : modern British art from the Tate Gallery: [catalogue of an exhibition held at the] Palais des Beaux-Arts, Brussels, 28 September-17 November 1973](http://ecx.images-amazon.com/images/I/11ridkXIj%2BL._SL160_.jpg)