Cyhoeddwyd ar ran Cyngor Sir Dyfed Adran Addysg = Published on behalf of Dyfed County Council Education Department.
Defnyddio lluniau lloeren dywydd. Cyfrol 2, Tywydd a hinsawdd o'r gofod. ISBN 1856442756. Published by Y Ganolfan Astudiaethau Addysg in 1992. Publication and catalogue information, links to buy online and reader comments.