title: [Differentiation of the age structure in Poland].
authors.forename: J J
authors.initials: JJ
authors.lastname: Parysek
mesh_terms: D017677:Age Distribution; D000367:Age Factors; D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D005843:Geography; D011044:Poland; D011153:Population; D011154:Population Characteristics
keywords: Age Distribution; Age Factors; Demographic Factors; Developed Countries; Eastern Europe; Europe; Geographic Factors; Poland; Population; Population Characteristics