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Supported in part by National Science Foundation Grant GP-6539.
Supported in part by National Science Foundation Grant GP-1623.
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Dembowski, P., Ostrom, T.G. Planes of ordern with collineation groups of ordern 2 . Math Z 103, 239–258 (1968). https://doi.org/10.1007/BF01111042
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DOI: https://doi.org/10.1007/BF01111042