Eleven booklets in a folder in a plastic envelope.
Lliw a llum by Cynllun y Cyngor Ysgolion, y Gymraeg fel Iaith Gyntaf yn yr Ysgol Gynradd. ISBN 0850885701. Published by Gwasg Gomer ar ran y Cyngor Ysgolion in 1978. Publication and catalogue information, links to buy online and reader comments.