الأسباب والعلامات = أسباب والعلل وعلاجها وعلاماتها = النجيبيات

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الأسباب والعلامات = أسباب والعلل وعلاجها وعلاماتها = النجيبيات. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.