Submitted on: 27 June 2019.
Revised on: 02 August 2019.
Accepted on: 09 August 2019.
Kuwait Journal of Science---ELSEVIER
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Submitted on: 12 August 2000.
Revised on: 22 September 2000.
Accepted on: 11 October 2000.
Kuwait Journal of Science
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Submitted on: 16 October 1998.
Revised on: 27 October 1998.
Accepted on: 03 November 1998.
Kuwait Journal of Science
Submitted on: 29 January 2014.
Revised on: 27 February 2014.
Accepted on: 26 March 2014.
Kuwait Journal of Science
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Submitted on: 11 April 2006.
Revised on: 01 May 2006.
Accepted on: 07 May 2006.
Kuwait Journal of Science---ELSEVIER
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