On some health indices of adolescents in the conditions of the dynamic urbanization of people's republic of Bulgaria.
D000293:Adolescent; D000367:Age Factors; D002031:Bulgaria; D004412:Dysmenorrhea / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D009497:Neurotic Disorders / Q000453:epidemiology; D011634:Public Health; D014505:Urban Population