1. Economic development districts, September 1, 1989 Author/Creator: United States. Economic Development Administration Publication/Creation: [Washington, D.C.?] : [The Administration], [1989] Format: Map Access & Availability: Loading
2. Entwicklung und Struktur der Bevölkerung 1815 bis 1980 Author/Creator: Laux, Hans-Dieter Publication/Creation: Köln : Rheinland-Verlag, [1989] Format: Map Access & Availability: Loading