title: The process of urbanization and various social and hygienic problems of urban children in the Bulgarian People's Republic.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002031:Bulgaria; D005260:Female; D006801:Humans; D006920:Hygiene; D008297:Male; D008599:Menstruation Disturbances / Q000453:epidemiology; D009497:Neurotic Disorders / Q000453:epidemiology; D014505:Urban Population
vernacular_title: Protsessy urbanizatsii i nekotorye sotsial-no-gigienicheskie problemy gorodskikh detei v narodnoi respublike Bolgarii