Cardinal vowels - Wikipedia
File:An outline of English phonetics fig54.png - Wikimedia Commons
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Daniel Jones Biography - Topics referred to by the same term
Bring back the Transatlantic accent
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Cardinal vowels - english speech services
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File:An outline of English phonetics fig52.png - Wikipedia
File:An outline of English phonetics fig35.png - Wikipedia
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Is Daniel Jones Cardinal 4 front or central?