1. U.S. Census of Population;U.S. Bureau of the Census,1960
2. General Population Characteristics;U.S. Bureau of the Census,1961
3. Hypertension and coronary heart disease: classification and criteria for epidemiological studies;World Health Organization;Wld. Hlth Org techn. Rep. Ser. No. 168,1959
4. Epidemiology and cardiovascular disease of middle age;Morris;Mod. Conc. cardiov. Dis.,1960