00865nam0 2200253 450 00002655920090917114201.0096557230720090917d1996----km-y0itay50------baengUSy-------001yyUnderstanding the GPSan introduction to the Global Positioning Systemby Gregory T. Frenchwhat it is and how it worksBethesdaGeoResearchc1996V, 255 p.ill.28 cmUnderstanding the GPS43348Astronomia geodetica526.6420Astronomia geodetica e posizionale. Posizione geograficaFrench,Gregory T.633581ITUNIPARTHENOPE20090917RICAUNIMARC000026559G 526.64/6G 384DSA2009Understanding the GPS43348UNIPARTHENOPE