title: Development, primacy, and systems of cities.
authors.forename: S
authors.initials: S
authors.lastname: El-shakhs
mesh_terms: D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004467:Economics; D005843:Geography; D008962:Models, Theoretical; D011153:Population; D011157:Population Dynamics; D012106:Research; D012922:Social Change; D014505:Urban Population; D014507:Urbanization
keywords: Demographic Factors; Developed Countries; Developing Countries; Economic Development; Economic Factors; Geographic Factors; Models, Theoretical; Population; Population Dynamics; Research Methodology; Social Development; Spatial Distribution; Urban Spatial Distribution; Urbanization