1. Acute lymphoblastic leukemia;Miller,1980
2. Seasonal childhood acute lymphocytic leukemia in the midwest;Harris;Iowa Med,1986
3. No seasonality in the diagnosis of acute leukemia in the United States;Walker;J Natl Cancer Inst,1982
4. Cancer incidence and mortality in the United States, 1973–1977;Young,1981
5. Epidemiologic Research;Kleinbaum,1982