OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The condition of sculpture : a selection of recent sculpture by younger British and foreign artists : [catalogue of an exhibition held at the] Hayward Gallery, London, 29 May-13 July 1975 by Arts Council of Great Britain. ISBN 0728700557. Published by Arts Council of Great Britain in 1975. Publication and catalogue information, links to buy online and reader comments.
![The condition of sculpture : a selection of recent sculpture by younger British and foreign artists : [catalogue of an exhibition held at the] Hayward Gallery, London, 29 May-13 July 1975](http://covers.openlibrary.org/b/id/4492587-M.jpg)