Halbert L. Dunn
Halbert L. Dunn, M.D. (1896–1975) was the leading figure in establishing a national vital statistics system in the United States and is known as the "father of the wellness movement".
Czytaj więcej...Halbert L. Dunn, M.D. (1896–1975) was the leading figure in establishing a national vital statistics system in the United States and is known as the "father of the wellness movement".
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