OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Irish watercolours, 1675-1925 : from the National Gallery of Ireland : [catalogue of] a loan exhibition at the Dallas Museum of Fine Arts [held] October-November 1976 by National Gallery of Ireland. ISBN 0903162040. Published by National Gallery of Ireland in 1976. Publication and catalogue information, links to buy online and reader comments.
![Irish watercolours, 1675-1925 : from the National Gallery of Ireland : [catalogue of] a loan exhibition at the Dallas Museum of Fine Arts [held] October-November 1976](http://ecx.images-amazon.com/images/I/410ixF4f8ML._SL160_.jpg)