Submitted on: 22 August 2011.
Revised on: 04 December 2011.
Accepted on: 17 December 2011.
___________________AMERICAN JOURNAL OF SCIENCE---AMER JOURNAL SCIENCE
Submitted on: 18 April 2003.
Revised on: 30 June 2003.
Accepted on: 20 July 2003.
___________________AMERICAN JOURNAL OF SCIENCE---AMER JOURNAL SCIENCE
Submitted on: 27 May 2024.
Revised on: 18 September 2024.
Accepted on: 03 November 2024.
___________________AMERICAN JOURNAL OF SCIENCE---AMER JOURNAL SCIENCE
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Submitted on: 29 January 2002.
Revised on: 01 April 2002.
Accepted on: 21 April 2002.
___________________AMERICAN JOURNAL OF SCIENCE---AMER JOURNAL SCIENCE
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