[Percent of children in the total population number during the last 60 years in Poland].
D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D011044:Poland; D011153:Population; D011154:Population Characteristics
Demographic Factors; Developed Countries; Eastern Europe; Europe; Poland; Population; Population Characteristics
Udzial dzieci w ogolnej liczbie ludnosci w okresie 60-lecia Polski