Portffolio yn cynnwys 6 llyfryn, 2 ddalen ac 1 cerdyn = Portfolio contains 6 booklets, 2 leaves and 1 card.
Awyr iach : yr ymgyrch dros fywyd di-fwg. ISBN 1872428088. Published by Ash in 1995. Publication and catalogue information, links to buy online and reader comments.