||A Cytological Study of Crepis Fuliginosa, C. Neglecta, and their F1 Hybrid, and its Bearing on the Mechanism of Phylogenetic Reduction in Chromosome Number
||Journal of Genetics, Vol. 45, No. 1, pp. 67-111, August
|| * Very good. Genetics. Cytology. Science. Uncommon offprint. Worldcat shows two holdings. First edition. Offprint.