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Gyda ffeil fodrwy o ddeunydd wedi ei gasglu o amrywiol ffynonellau = With ring binder of material collected from various sources.
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Ar waith gyda'n gilydd : llawlyfr ar fentro yn eich ardal chi. ISBN 1872954014. Published by Menter a Busnes in 1991. Publication and catalogue information, links to buy online and reader comments.