[Demographic aspects of multiple births in Poland].
Piasecki
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D000367:Age Factors; D001519:Behavior; D001695:Biology; D003710:Demography; D019049:Developed Countries; D004467:Economics; D004522:Educational Status; D005060:Europe; D005061:Europe, Eastern; D005298:Fertility; D005823:Genetics; D005828:Genetics, Population; D005843:Geography; D008423:Maternal Age; D010290:Parents; D011044:Poland; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D012111:Residence Characteristics; D012725:Sexual Behavior; D012923:Social Class; D012959:Socioeconomic Factors
Age Factors; Behavior; Biology; Demographic Factors; Developed Countries; Eastern Europe; Economic Factors; Educational Status; Europe; Fertility; Genetics; Genetics, Population; Geographic Factors; Historical Survey; Maternal Age; Parental Age; Poland; Population; Population Characteristics; Population Dynamics; Residence Characteristics; Sex Behavior--women; Socioeconomic Factors; Socioeconomic Status; Spatial Distribution