1. Eugenics Laboratory Memoirs No. 23, " The Treasury of Human Inheritance ";BELL, J.U.L.I.A.,1926
2. Memoirs of the Literary and;DALTON, J.;Philosophical Society of Manchester; Cadell and Davies,1798
3. HUDDART, J. (1777). Phil. Trans. roy. Soc., 67, pt. 1, p. 260.
4. RozIER, L'ABBA (1779). " Observations sur la physique, sur l'histoire naturelle et sur les arts ";LORT, M.;Ibid,1778
5. Genetics in Ophthalmology;SORSBY, A.,1951