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1Cyhoeddwyd 2008Pynciau “...Power resources New Zealand Terminology....”
Electronig Meddalwedd eLyfr -
2
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3Cyhoeddwyd 1997Pynciau “...Power resources New Zealand Periodicals....”
Archived copy available at the National Library of New Zealand
Electronig Cyfresol -
4Cyhoeddwyd 2008Pynciau Archived copy available at the National Library of New Zealand
Electronig Cylchgrawn -
5