http://at.marketwire.com/accesstracking/AccessTrackingLogServlet?docid=0820387001&sourceType=1http://media3.marketwire.com/logos/20120905-NXTlogo.jpg CALGARY, ALBERTA -- (Marketwire) -- -- NXT Energy Solutions Inc. ("NXT" or the "Company") (TSX VENTURE:SFD)(OTCBB:NSFDF) announces that it has now completed formal execution of its US $4.73 million SFD® survey contract (as announced on September 12, 2012) with Petroleos Mexicanos ("PEMEX"), the National Oil Company of Mexico, and the 4th largest oil & gas exploration & production company in the world. SFD® data acquisition operations, covering large offshore and onshore areas in Mexico and have now been completed....
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