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Submitted in partial fulfillment of the degree of Doctor of Philosophy in Botany at the University of Illinois, Urbana.
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Levin, D.A. The Phlox pilosa complex: Crossing and chromosome relationships. Brittonia 18, 142–162 (1966). https://doi.org/10.2307/2805198
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DOI: https://doi.org/10.2307/2805198