1. M. J.Holmes: “Cancer Mortality in Australia” “Commonwealth of Australia: Department of Health Service Publication” Number 30 1925.
2. C. H. C.Searby: “The Incidence Regional Distribution and Mortality of Malignant Disease at the Melbourne Hospital During the Years 1921‐1928” “Health Cancer Supplement of the Commonwealth of Australia” November‐December 1929 page2.
3. ChevalierJackson quoted bySt. ClairThomsonandColledge: “Cancer of the Larynx” 1930 page33.