[Osteoma spongiosa of the external auditory canal].

@article{Lehnig1970OsteomaSO,
  title={[Osteoma spongiosa of the external auditory canal].},
  author={J Lehnig},
  journal={HNO},
  year={1970},
  volume={18 12},
  pages={
          369-70
        }
}

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