P1042 Arg Saesneg gwreiddiol = Original English ed: London: Franklin Watts, 1986.
P1073 Addasiad Cymraeg o = Welsh adaptation of: Piggybook.
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Chwarae moch bach by Anthony Browne. ISBN 0948930020. Published by Cymdeithas Lyfrau Ceredigion in 1993. Publication and catalogue information, links to buy online and reader comments.