Is the solar chromospheric magnetic field force-free?

@article{Metcalf1995IsTS,
  title={Is the solar chromospheric magnetic field force-free?},
  author={Thomas R. Metcalf and Li Guang Jiao and A. N. Mcclymont and Richard C. Canfield and Han Uitenbroek},
  journal={The Astrophysical Journal},
  year={1995},
  volume={439},
  pages={474-481}
}
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