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Submitted on: 27 August 2012.
Revised on: 23 December 2012.
Accepted on: 08 February 2013.
___________________Journal of Arid Environments---ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Submitted on: 23 June 2007.
Revised on: 11 October 2007.
Accepted on: 24 October 2007.
___________________Journal of Arid Environments---ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
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Submitted on: 10 August 2007.
Revised on: 30 September 2007.
Accepted on: 01 November 2007.
___________________Journal of Arid Environments---ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
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