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Sources

• COLLINGE 1990 267 (next rank down)

  COLLINGE, N. E. (1990) An Encyclopaedia of Language. London: Routledge.

• RICHARDS etal. 1992 304

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