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Submitted on: 12 December 2011.
Revised on: 27 January 2012.
Accepted on: 01 March 2012.
___________________APPLIED SPECTROSCOPY---SAGE PUBLICATIONS INC
Submitted on: 07 August 2006.
Revised on: 28 August 2006.
Accepted on: 09 September 2006.
___________________APPLIED SPECTROSCOPY---SAGE PUBLICATIONS INC
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