{
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    "abstract": "The first attainment of longitudinal spin polarisation in a high energy\nelectron (positron) storage ring is described.",
    "arxiv_id": "physics/9901041",
    "authors": [
      "D. P. Barber"
    ],
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    "title": "II. Longitudinal Electron Spin Polarisation at 27.5 GeV in HERA",
    "url": "https://arxiv.org/abs/physics/9901041"
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