1. C.B. Bridges, T.H. Morgan, The Third-Chromosome Group of Mutant Characters of Drosophila melanogaster, Publication no. 327 (Carnegie Institute of Washington, 1923).
2. R.A. Fisher, The Design of Experiments (Oliver and Boyd, Edinburgh, 1937).
3. R.A. Fisher, F. Yates, Statistical Tables, Table VII (Oliver and Boyd, Edinburgh, 1938).
4. J.B.S. Haldane, J. Genet. 8, 299–309 (1919).
5. D. de Winton, J.B.S. Haldane, J. Genet. 31, 67–100 (1935).