[Births outside of marriage].
Kuciarska-ciesielska
M
M
D003710:Demography; D019049:Developed Countries; D005060:Europe; D005061:Europe, Eastern; D007086:Illegitimacy; D011044:Poland; D011153:Population; D011154:Population Characteristics; D012940:Social Problems
Demographic Factors; Developed Countries; Eastern Europe; Europe; Illegitimacy; Poland; Population; Population Characteristics; Social Problems