SLAC-PEP. TPC/2GAMMA Collaboration. Measurement of pbar p production in two photon interactions for quasi-real (untagged) photons with 2.0 & lt; W & lt; 2.8 GeV. Paper also reports of this process with one of the photons highly virtual, having spacelike invariant mass squared -Q**2 where 0.16 & lt; Q**2 & lt; 1.6 GeV**2.
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