primary cardinal vowel

Sources

• TRASK 1996 288

  TRASK, R. L. (1996) A Dictionary of Phonetics and Phonology. London: Routledge. 

• MATTHEWS 1997 46

  MATTHEWS, P.H. (1997) The Concise Oxford Dictionary of Linguistics. Oxford: Oxford University Press.

• RICHARDS etal. 1992 45

  RICHARDS, Jack, PLATT, J. & WEBER, H. (1992) Longman Dictionary of Language Teaching & Applied Linguistics. London: Longman.

• CRYSTAL 2003 62

  CRYSTAL, David. (2003) A Dictionary of Linguistics and Phonetics, 5th Ed Oxford: Blackwell.