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In page New Zealand English:

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Another authoritative work is the Collins English Dictionary, first published in 1979 by HarperCollins, which contains an abundance of well-cited New Zealand words and phrases, drawing from the 650-million-word Bank of English, a British research facility set up at the University of Birmingham in 1980 and funded by Collins publishers.[9] Although this is a British dictionary of International English there has always been a credited New Zealand advisor for the New Zealand content, namely Professor Ian Gordon from 1979 until 2002 and Professor Elizabeth Gordon from the University of Canterbury since 2003.[citation needed]