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@unpublished{TUW-119648,
    author = {Retscher, G{\"u}nther},
    title = {Indoor and Pedestrian Navigation (IAG WG 4.1.2)},
    year = {2004},
    note = {invited; talk: Workshop on Location-based Technologies, Services and Applications; European Commission, Information Society Technologies, Directorate D-Communication Networks, Security {\&} Software. Applications, Unit D1 - Communication and Network Technologies, Bruessel, Belgium; 2004-03-08}
}