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Ar ben y wyneb ddalen = At head of title page: Dyma'r dystiolaeth.
Dyfyniadau o = Quotations from: Annales Cambriae; Cronica de Wallia; Annales de Margam; Dogfennau eglwysig; Cofrestr a chronicl Abaty Aberconwy.
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Y Cyfnod yn y cofnod : croniclau a llythyrau o'r oesoedd canol. ISBN 1856441989. Published by Canolfan Astudiaethau Addysg in 1992. Publication and catalogue information, links to buy online and reader comments.