Submitted on: 09 January 2007.
Revised on: 14 March 2007.
Accepted on: 10 April 2007.
___________________INTERNATIONAL JOURNAL OF SPELEOLOGY
Submitted on: 07 July 2012.
Revised on: 06 September 2012.
Accepted on: 11 October 2012.
___________________INTERNATIONAL JOURNAL OF SPELEOLOGY
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Submitted on: 06 December 2003.
Revised on: 02 January 2004.
Accepted on: 15 February 2004.
___________________INTERNATIONAL JOURNAL OF SPELEOLOGY
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Submitted on: 05 December 2007.
Revised on: 28 February 2008.
Accepted on: 22 March 2008.
___________________INTERNATIONAL JOURNAL OF SPELEOLOGY