title: Birth order: urban-rural effects on need affiliation and school activity participation among high school male students.
mesh_terms: D001722:Birth Order; D002657:Child Development; D006801:Humans; D008297:Male; D010551:Personality; D010555:Personality Inventory; D012424:Rural Population; D012574:Schools; D012919:Social Behavior; D013334:Students; D014505:Urban Population