[Differentiation of the age structure in Poland].
Parysek
J J
JJ
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
Age Distribution; Age Factors; Demographic Factors; Developed Countries; Eastern Europe; Europe; Geographic Factors; Poland; Population; Population Characteristics