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Submitted on: 02 June 2010.
Revised on: 17 September 2010.
Accepted on: 02 November 2010.
___________________Gospodarka Surowcami Mineralnymi-Mineral Resources Management
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Submitted on: 05 March 1999.
Revised on: 10 May 1999.
Accepted on: 17 June 1999.
___________________Gospodarka Surowcami Mineralnymi-Mineral Resources Management
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