Appendix A: Sample Data Sources Phase I Closeout” Presentation to Steering Council. NASA. September 2, 2010. Retrieved from: . “HEFT Technology Assessments: Technology Readiness Levels.” NASA. Retrieved from: . “HRST Obama, B. by the President on Space Exploration in the 21st Century.” Kennedy Space Center, “Remarks Florida. April 15, 2010. Retrieved from: .
Appendix A: Sample Data Sources “HEFT Phase I Closeout” Presentation to Steering Council. NASA. September 2, 2010. Retrieved from: . “HRST Technology Assessments: Technology Readiness Levels.” NASA. Retrieved from: . Obama, B. “Remarks by the President on Space Exploration in the 21st Century.” Kennedy Space Center, Florida. April 15, 2010. Retrieved from: .