O gam i gam : (rhaglen Bangor) : cyflwyno Cymraeg i ddisgyblion dyslecsig ac i eraill sydd ag anawsterau darllen a sillafu by Elisabeth Griffith. ISBN 1856442616. Published by Y Ganolfan Adnoddau Addysg in 1994. Publication and catalogue information, links to buy online and reader comments.