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Let us summarize. A receiver consisting of dual geophone-hydrophone sensors measures two attributes of the wavefield: particle velocity and pressure. The dual-sensor receiver is buried below the level of the buried source. Einstein deconvolution, which requires dual-sensor data, removes all reverberations and ghosts that result from interfaces above the receiver. Einstein deconvolution also removes the unknown source signature in the same operation. The resulting deconvolved seismogram is the unit-impulse reflection response that would have been produced in the absence of any layers above the buried receiver. If desired, we can perform dynamic deconvolution on the unit-impulse reflection response that we previously have obtained with Einstein deconvolution. The output of the dynamic deconvolution process is the sequence of reflection coefficients for interfaces below the receiver. Einstein deconvolution operates under the same limitations as does predictive deconvolution. Thus, the limitations for Einstein deconvolution are similar to those for predictive deconvolution.