JOURNALS
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April 2001 | |
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November 2001 | |
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April 2002 | |
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November 2002 | |
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August 2003 | |
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November 2003 | |
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2004 June | |
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November 2005 | |
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November 2006 | |
Box: 01 - 01 - 1178 Ecuador basin Telefax: (593) 7 818 840 Email: svanegas@uazuay.edu.ec |