[Socioeconomic working conditions and the age at menarche].
D000293:Adolescent; D003604:Czechoslovakia; D004651:Employment; D005260:Female; D006801:Humans; D008598:Menstruation; D009787:Occupational Medicine; D012924:Social Conditions; D012959:Socioeconomic Factors
Sociálnĕ ekonomické podmínky zivota a vĕk pri menarche.