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4Cyhoeddwyd 1970“...Business & Economic Service,...”
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8Cyhoeddwyd 1994“...IEEE Service Center,...”
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9“...New Zealand Meteorological Service, New Zealand Meteorological Service,...”
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14gan Gay, F. J. (Francis Joseph), 1910-“...Editorial and Publications Service, CSIRO,...”
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17gan Nicholas, D. J. D. (David James Donald)“...Australian Government Publishing Service,...”
Cyhoeddwyd 1980
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Cyhoeddwyd 1979
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