National Research Council (U.S.). Committee on the Future of the Global Positioning System & National Research Council (U.S.). Commission on Engineering and Technical Systems. (1995). The Global Positioning System: A shared national asset : recommendations for technical improvements and enhancements. National Academy Press.

National Research Council (U.S.). Committee on the Future of the Global Positioning System and National Research Council (U.S.). Commission on Engineering and Technical Systems. The Global Positioning System: A Shared National Asset : Recommendations for Technical Improvements and Enhancements. Washington, D.C.: National Academy Press, 1995.

National Research Council (U.S.). Committee on the Future of the Global Positioning System and National Research Council (U.S.). Commission on Engineering and Technical Systems. The Global Positioning System: A Shared National Asset : Recommendations for Technical Improvements and Enhancements. National Academy Press, 1995.