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Submitted on: 21 September 2023.
Revised on: 23 October 2023.
Accepted on: 22 December 2023.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
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Submitted on: 02 February 2010.
Revised on: 16 May 2010.
Accepted on: 24 June 2010.
___________________ENGINEERING ECONOMIST---TAYLOR & FRANCIS INC
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