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Gwefr gwyddoniaeth
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Gwefr gwyddoniaeth

Keith Johnson

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Descriptive Notes

Arg. Saesneg gwreiddiol = Original English ed.: Cheltenham: Stanley Thornes, 1994.
Yn cynnwys mynegai = Includes index.
Addasiad Cymraeg gan = Welsh adaptation by: Ceri Williams, John Williams, Sandra Williams a Delyth Ifan.

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Gwefr gwyddoniaeth by Keith Johnson. ISBN 185644371X. Published by Canolfan Astudiaethau Addysg in 1998. Publication and catalogue information, links to buy online and reader comments.

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