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Die invloed van gereelde daggagebruik op die skoolprestasies en intellektuele vermoe van 'n groep leerlinge in 'n nywerheidskool
(Stellenbosch : Stellenbosch University, 1990)ENGLISH ABSTRACT: The present research attempted to determine the effect of regular dagga usage on school performance and intellectual ability of a group or adolescent boys. The research sample comprised of eighty ...
