1. Cancer incidence in five continents;Muir,1987
2. Atlas of cancer mortality for U.S. counties: 1950–1969;Mason,1975
3. Cancer incidence rates in the Pacific Basin;Menck;NCI Monogr.,1978
4. 1986 Cancer Mortality Advance Data;Hahn,1989
5. Do sunlight and vitamin D reduce the risk of colon cancer?;Garland;Int J Epidemiol,1980