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@unpublished{TUW-229569,
    author = {Mayr, Markus},
    title = {Lizenzen in freier Wildbahn},
    year = {2014},
    keywords = {OpenStreetMap lizenzen odbl cc-by-sa vgi},
    note = {invited; talk: AGIT 2014, Salzburg; 2014-07-02 -- 2014-07-04}
}