Menarcheal age of schoolgirls in the district of Naples, Italy, in 1969-70.
D000293:Adolescent; D000367:Age Factors; D002648:Child; D004522:Educational Status; D005260:Female; D006801:Humans; D007558:Italy; D008572:Menarche; D008598:Menstruation; D010298:Parity; D011627:Puberty; D012959:Socioeconomic Factors