1956 – Excessive natural heat (US Public Health Service code E931) — 174

–174 USPHS Vital Statistics of the US 1956: Vol. II – Mortality Statistics. HEW, 1958. p. 108.

Source

United States Public Health Service, Department of Health, Education, and Welfare. Vital Statistics of the United States 1956, Volume II, Mortality Data. Washington, GPO, 1958. Accessed 4-4-2023 at: http://www.cdc.gov/nchs/data/vsus/VSUS_1956_2.pdf