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1دورية أكاديمية
المؤلفون: Beeman, E. R., Knauss, D. E.
المصدر: Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry Trans. AIEE, Part II: Applicat. Ind. American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the. 81(3):116-120 Jul, 1962