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"Hulegu, contrite at the damage he had wrought, patronized the great Persian scholar, Nasiruddin Tusi (died 1274), who saved the lives of many other scientists...

ھارٹ؛ پیج 31؛ تخلیقات پبلیشرز لاہور} سانچو:Librivox author سانچو:GoogleScholar ScienceWorld biography by Eric Weisstein Dictionary of Scientific Biography...