title: Components in the evolution of urban systems: theory and empirical testing.
authors.forename: O L
authors.initials: OL
authors.lastname: Medvedkova
mesh_terms: D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005843:Geography; D005859:Germany, East; D011044:Poland; D011153:Population; D014586:USSR; D014505:Urban Population
keywords: Developed Countries; Eastern Europe; Europe; Geographic Factors; German Democratic Republic; Poland; Population; Spatial Distribution; Urban Spatial Distribution; Ussr