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UPCOTT, M. 1936. The parents and progeny o( Acsculus camca.J. Genet., 33 : 135-149. 



UPCOTT, M. 1939. The nature of tetraploidy in Primula kcwensis. J. Genet., 39: 

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UPCOTT, M., and philp, j. 1939. The genetic structure of Tulipa. IV Balance, 

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