Dylunio a thechnoleg 11-14 /
Williams, Howard Alun.
Welsh Joint Education Committee.
National Language Unit of Wales.
Caerdydd : Cyd-Bwyllgor Addysg Cymru,
1998.
Addasiad Cymraeg gan = Welsh adaptation by: Howard Alun Williams.
Cyhoeddwyd dan nawdd Cynllun Adnoddau Cyd-bwyllgor Addysg Cymru = Published under the auspices of the Welsh Joint Education Committee Resources Project.
Yn cynnwys mynegai = Includes index.
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