Certification on Compliance with Manual on Corporate Governance
Certification on Petroleum Service Contracts with DOE
Computation of Public Ownership Report as of December 31, 2011
Report on the Nnumber of Shareholders as of December 31, 2011
Certification on attendance of members of Board of Directors for the year 2011
Statement of Changes in Beneficial Ownership_(SEC_Form_23B)
Top 100 Stockholders as of December 31, 2011