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2021-8-28 · อ่านเพิ่มเติม Edwin F. Taylor and John Archibald Wheeler, Spacetime Physics, 2nd ed. (Freeman, NY, 1992) Albert Einstein, Relativity, the special and the general theories, 15th ed. (1954) Poincaré, Henri (1900). "La théorie de Lorentz et le Principe de