00441    a2200145   4500020001500000082001600015100003700031245006300068260006500131300001800196440003200214650002100246650001500267650001300282  a9558928011  a001.42bGLO  aSilva, Ranjith Premalal De eed.  aGlobal positioning systems btheory,application & practice  aSri LankabGeo- Informatics Society of Sri Lankac2004g2004  aii,60p.c25cm  aProceedings  of the GPS day  aResearch methods  aKnowleadge  aResearch