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Eon, A d , and ZO?ro final-state cross sections and AT" and Z0.jro polarizations are obtained in I<-p interactions, for PKin the range 350-430 MeV/c, near the A(1520) resonance Two fits to the partial-wave ainplitudes have been found, both assuming a standard Breit-Wigner amplitude for the A(1520) resonance and a constant-scattering-length 0 3 1 2 isospin-1 amplitude, but differing in their treatment of the S-and P-wave backgrounds. One method used a constant K matrix, the other a momentum-dependent effectiverange expansion for the inverse of the K matrix. From the fitted partial waves, an upper limit oi 10% is set for an isospin mixing between the ArO and ZOno amplitudes. * Present address: Physics Department, Rutgers University, wave analysis, but only to give a satisfactory framework New Brunswick, N. J. t Work performed under the auspices of the U. S. Atomic for the isospin nixing analysis described below. Energy Commission. We have used these fitted amplitudes to place an f Work supported in part by the U. S. Atomic Energy Commission, under Contract No. AT(30-1)-3651, and in part b], a LlPPer limit on isospin lnising in the observed Ano and faculty research grant of the University of hIassachusetts.BOnO amplitudes. Such mixing would reflect a breakdown

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