Comments on 'Lateral heterogeneity at the base of the mantle revealed by observations of amplitudes of PKP phases' by I. S. Sacks, J. A. Snoke and L. Beach |
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Authors: | R A Clark R G Pearce |
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Institution: | Department of Earth Sciences, The University, Leeds LS2 9JT;MOD(PE), Blacknest, Brimpton, Reading, Berkshire RG7 4RS |
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