{"id":"001009995","type":"book","title":"Grenze und Grenzland aus geographischer Sicht","publisher":"Hakkert","publisher-place":"Amsterdam","pages":"487-496","container-title":"Stuttgarter Kolloquium zur historischen Geographie des Altertums. 4, 1990","author":[{"family":"Hagel","given":"Jürgen"}],"issued":{"raw":"1994"}}