1. Entwicklung und Struktur der Bevölkerung 1815 bis 1980 Author/Creator: Laux, Hans-Dieter Publication/Creation: Köln : Rheinland-Verlag, [1989] Resource Type: Map Access & Availability: Loading
2. USSR energy atlas Author/Creator: United States. Central Intelligence Agency Publication/Creation: [Washington, D.C.] : Central Intelligence Agency : May be purchased from Supt. of Docs., U.S. G.P.O., [1985] Resource Type: Map Access & Availability: Loading