title: Gang characteristics: an empirical survey.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D003415:Crime; D006040:Goals; D006608:Hierarchy, Social; D006801:Humans; D007604:Juvenile Delinquency; D007857:Leadership; D008297:Male; D008399:Mass Behavior; D012606:Scotland; D014505:Urban Population