title: A longitudinal study of metropolitan density patterns in a developing country:  Puerto Rico, 1899-1970.
authors.forename: S
authors.initials: S
authors.lastname: Vaughan
authors.forename: K P
authors.initials: KP
authors.lastname: Schwirian
mesh_terms: D000569:Americas; D017691:Caribbean Region; D003710:Demography; D003906:Developing Countries; D005843:Geography; D007843:Latin America; D009656:North America; D011153:Population; D011647:Puerto Rico; D014505:Urban Population
keywords: Americas; Caribbean; Developing Countries; Geographic Factors; Latin America; North America; Population; Puerto Rico; Spatial Distribution; Urban Spatial Distribution