Submitted on: 27 August 2012.
Revised on: 17 November 2012.
Accepted on: 07 December 2012.
___________________BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
Submitted on: 13 February 2019.
Revised on: 10 April 2019.
Accepted on: 07 May 2019.
___________________BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
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Submitted on: 21 August 2017.
Revised on: 05 November 2017.
Accepted on: 06 December 2017.
___________________BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
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Submitted on: 30 December 2003.
Revised on: 04 April 2004.
Accepted on: 22 May 2004.
___________________BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA