books his contributions and writings
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# Ibn Khaldun and his writings and contributions
# His contributions to the Iraqi theater
# His contributions to science
# His international contributions
# His sports contributions
# His contributions to the Saudi golf team
# His scientific and intellectual contributions
# His contributions to architecture
# His contributions to culture
# His contributions to the development of medicine in Egypt
# His scientific contributions outside the university
# His scientific and cultural contributions
# His journalistic contributions
# His astronomical contributions
# His various contributions
# His cultural and scientific contributions
# His contributions to photography
# His cultural contributions
# His cultural and literary contributions
# His literary contributions
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Source: wikipedia.org
إسهاماته ومؤلفاته (Info)
أسهم مع ليون فالراس Leon Walras في النمسا و كارل منجر Carl Menger في سويسرا، في وضع نظرية "القيمة-المنفعة".
وأبرز كتبه هي (نظرية الاقتصاد السياسي)، (دروس أولية في المنطق : الاستنباطي والاستقرائي)، (مبادئ العلم).
