Submitted on: 30 June 2003.
Revised on: 14 July 2003.
Accepted on: 28 July 2003.
PHONETICA---DE GRUYTER MOUTON
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Submitted on: 10 April 2008.
Revised on: 17 May 2008.
Accepted on: 21 May 2008.
PHONETICA---DE GRUYTER MOUTON
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