Submitted on: 24 June 2004.
Revised on: 27 September 2004.
Accepted on: 08 November 2004.
___________________JOURNAL OF PALEOLIMNOLOGY---SPRINGER
Submitted on: 05 October 2007.
Revised on: 30 October 2007.
Accepted on: 22 November 2007.
___________________JOURNAL OF PALEOLIMNOLOGY---SPRINGER
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Submitted on: 16 November 2005.
Revised on: 14 March 2006.
Accepted on: 04 May 2006.
___________________JOURNAL OF PALEOLIMNOLOGY---SPRINGER
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Submitted on: 12 October 2002.
Revised on: 29 January 2003.
Accepted on: 22 March 2003.
___________________JOURNAL OF PALEOLIMNOLOGY---SPRINGER
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Submitted on: 25 July 2007.
Revised on: 24 August 2007.
Accepted on: 27 September 2007.
___________________JOURNAL OF PALEOLIMNOLOGY---SPRINGER