$NG SEC Filings

Filing Filed On
SUPPL 02 Feb 2012
SUPPL 01 Feb 2012
PROSPECTUS SUPPLEMENT 08 Mar 2010
SUPPLEMENT PROSPECTUS 05 Mar 2010
FINAL PROSPECTUS SUPPLEMENT 20 Mar 2008
PROSPECTUS SUPPLEMENT 19 Mar 2008
PROSPECTUS SUPPLEMENT 06 Mar 2008
FINAL PROSPECTUS SUPPLEMENT 20 Apr 2007
PROSPECTUS SUPPLEMENT 18 Apr 2007
FILED PURSUANT TO GENERAL INSTRUCTION II.L OF FORM F-10 03 Feb 2006