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Submitted on: 07 May 2014.
Revised on: 28 June 2014.
Accepted on: 16 July 2014.
___________________Beni-Suef University Journal of Basic and Applied Sciences
Submitted on: 29 October 2020.
Revised on: 17 February 2021.
Accepted on: 01 March 2021.
___________________Beni-Suef University Journal of Basic and Applied Sciences
Submitted on: 26 November 2012.
Revised on: 13 January 2013.
Accepted on: 28 January 2013.
___________________Beni-Suef University Journal of Basic and Applied Sciences
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Submitted on: 30 November 2012.
Revised on: 07 March 2013.
Accepted on: 31 March 2013.
___________________Beni-Suef University Journal of Basic and Applied Sciences
Submitted on: 29 August 2019.
Revised on: 07 November 2019.
Accepted on: 31 December 2019.
___________________Beni-Suef University Journal of Basic and Applied Sciences