103 Graphs that are irreducible for the projective plane

@article{Glover1979103GT,
  title={103 Graphs that are irreducible for the projective plane},
  author={Henry H. Glover and John Philip Huneke and Chin San Wang},
  journal={J. Comb. Theory, Ser. B},
  year={1979},
  volume={27},
  pages={332-370}
}
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