books جاك هلبرن أستاذ جامعي
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Source: wikipedia.org
جاك هلبرن (أستاذ جامعي) (Info)
جاك هلبرن (بالإنجليزية: Jack Halpern) هو كيميائي أمريكي، ولد في 19 يناير 1925 في بولندا، وتوفي في 31 يناير 2018 في شيكاغو في الولايات المتحدة.
