Submitted on: 03 March 2003.
Revised on: 21 May 2003.
Accepted on: 05 July 2003.
___________________Acta Structilia---UNIV FREE STATE, DEPT QUANTITY SURVEYING & CONSTRUCTION MANAGEMENT
Submitted on: 29 April 2001.
Revised on: 13 August 2001.
Accepted on: 29 August 2001.
___________________Acta Structilia---UNIV FREE STATE, DEPT QUANTITY SURVEYING & CONSTRUCTION MANAGEMENT
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