gradual opposition

Type(s) of

Sources

• TRASK 1996 162

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

• VACHEK 1966 57

  VACHEK, Josef. (1966) The Linguistic School of Prague. Bloomington, IN: Indiana University Press.

• ELL 5128

  The Encyclopedia of Language & Linguistics. (1994) Oxford: Pergamon Press.

• TRUBETZKOY 1969[trans.] 75

  TRUBETZKOY, N.S. (1969 [trans.]) Principles of Phonology. Trans by Christiane A.M. Baltaxe. Berkeley : University of California Press.

• MATTHEWS 1997 150

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

• CRYSTAL 2003 207, 328

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