Terms for subject Historical containing основа

Russian	English
историческая основа	historic basis (Alex_Odeychuk)
на документальной основе	based on documentary sources (Maria Klavdieva)
на основе письменных источников	on the basis of written sources (Alex_Odeychuk)
не иметь фактографической основы	have no factual basis (Alex_Odeychuk)
не иметь фактологической основы	have no factual basis (Alex_Odeychuk)
разрушить основы цивилизации	wreck the foundations of civilization (Alex_Odeychuk)