1. Cancer statistics, 1988;Silverberg;CA,1988
2. Cancer in five continents;Waterhouse,1976
3. The patient record in epidemiology;Kurland;Sci Am,1981
4. Mayo Clinic records linkage system in the Rochester-Olmsted epidemiology program project;Kurland,1973
5. Incidence of non-melanoma skin cancer in the United States;Scotto,1983