Al-Harbi, Rawabi Abdulaziz Effect of gamma rays on the physical properties of ferroelectric perovskite / Rawabi Abdulaziz Al-Harbi ؛ Supervised by Hafedh Belmabrouk - 43 sheets ؛ 30 cm. Supervised : Hafedh Belmabrouk Subjects--Topical Terms: Gamma rays-- physiological effect--Saudi Arabia Dewey Class. No.: 539.7222 / HRE