Abstract
References
1.
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(2005 ). BP Statistical Review of World Energy, June .
2.
Petroleos Mexicanos
(2006 ). Pemex Outlook, March 31, available on the web at http://www.pemex.com/files/content/dcf_pemex_outlook_060331_i.pdf .
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(1993 ). “An Almost Practical Step Toward Sustainability ,” Resources Policy 19 (3 ) September: 162 -172 .