@article{1364213,
      author = {Hofmann-Wellenhof, B., and Lichtenegger, H., and Collins,  J.,},
      url = {http://library.usi.edu/record/1364213},
      title = {Global Positioning System : theory and practice /},
      recid = {1364213},
      pages = {1 online resource (406 pages) :},
}