DOI:
10.1055/s-00034612
Yearbook of Medical Informatics
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References
Improving the Civilian Global Positioning System (GPS) [Internet]..
Washington: Office of Science & Technology Policy; c2000 [cited 2012 Apr 19]..
Available from:
http://clinton4.nara.gov/WH/EOP/OSTP/html/0053_4.html.
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