Wells, A study of the formants of the pure vowels of British English
The phonetic and phonemic symbols used are those of the International Phonetic Association .
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Phonemic symbols for RP vowels are as follows:
The above transcription is called the 'Narrow Transcription' by Jones [21, p. 343].
In accordance with the usual custom, phonetic (allophonic) symbols are placed between square brackets [ ], and phonemic symbols between slants / /.
Square brackets also enclose bibliographical references.
* used in preference to the older symbols ɪ, ʊ.