Ahrer, H. & Auzinger, T.: Der 鰏terreichische DARC-DGPS Dienst. in: Papers presented at the ?0. Internationale geod鋞ische Woche Obergurgl? 21-27 February, 1999, (German). http://info.uibk.ac.at/c/c8/c802/obg99/ahrer. html (Last visited: May, 2001)

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