Submitted on: 03 May 2005.
Revised on: 07 June 2005.
Accepted on: 21 June 2005.
WMU Journal of Maritime Affairs
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Submitted on: 10 July 1999.
Revised on: 23 July 1999.
Accepted on: 31 July 1999.
WMU Journal of Maritime Affairs
Submitted on: 10 April 2001.
Revised on: 23 May 2001.
Accepted on: 13 June 2001.
WMU Journal of Maritime Affairs
Submitted on: 06 July 2010.
Revised on: 29 July 2010.
Accepted on: 25 August 2010.
WMU Journal of Maritime Affairs
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Submitted on: 10 April 1999.
Revised on: 03 May 1999.
Accepted on: 24 May 1999.
WMU Journal of Maritime Affairs
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