Compliance Recertification Application 2014 
      
      Frigaard, I.A., and N.L. Humphries.
      
         - Frigaard, I.A., and N.L. Humphries. 1997. "High Penetration Rates: Hazards and Well Control—A Case Study." Proceedings, March 1997 Society of Petroleum Engineers/International Association of Drilling Contractors Drilling Conference
            (SPE paper 37953). Amsterdam: Society of Petroleum Engineers. (Unavailable)
(*Indicates a reference that has not been previously submitted.)