David HeydBooksמסה על שכל האדםTolerationSupererogationha-Ḥayim ha-ṭovimEsteṭiḳahאסתטיקהHandbook of SupererogationEtikah u-refuah (Sifriyat "universitah meshuderet")TolerationTasāhulCalculus With Analytic Geometry, AlternateGenethicsAuthor data: Open Library