Cyfieithwyd o'r ail arg o'r Saesneg gwreiddiol = Translated from the second ed of the original English: Oxford: Pergamon, 1977.
Yn cynnwys mynegai = Includes index.
Cyfieithydd = Translator: Huw Roberts.
Cyflwyniad i hwsmonaeth anifeiliaid by Maurice Buckett. ISBN 187191339X. Published by Canolfan Astudiaethau Iaith in 1990. Publication and catalogue information, links to buy online and reader comments.