Submitted on: 23 August 2018.
Revised on: 05 November 2018.
Accepted on: 23 December 2018.
___________________Challenges in Sustainability---LIBRELLO PUBLISHING HOUSE
Submitted on: 23 October 2004.
Revised on: 11 December 2004.
Accepted on: 31 January 2005.
___________________Challenges in Sustainability---LIBRELLO PUBLISHING HOUSE
Submitted on: 23 November 2020.
Revised on: 17 February 2021.
Accepted on: 08 March 2021.
___________________Challenges in Sustainability---LIBRELLO PUBLISHING HOUSE
Submitted on: 17 November 2000.
Revised on: 24 January 2001.
Accepted on: 27 February 2001.
___________________Challenges in Sustainability---LIBRELLO PUBLISHING HOUSE
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