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"The Confrontation between General Relativity and Experiment"
Clifford M. Will 
Equation Icon  ∫ [ α β( ) ] I = κR + --ϕ∗RR − -- gμν∂μϕ ∂νϕ + 2V (ϕ) (− g)1∕2d4x + Im(ψm, gμν), (59 ) 4 2