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Porterfield JD. Report of the chairman of the executive board of the american public health association to the governing council, 1964-1965. Am J Public Health Nations Health. 1966;56(1):106-12doi: 10.2105/ajph.56.1.106.
Porterfield, J. D. (1966). Report of the chairman of the executive board of the american public health association to the governing council, 1964-1965. American journal of public health and the nation's health, 56(1), 106-12. https://doi.org/10.2105/ajph.56.1.106
Porterfield, J D. "Report of the chairman of the executive board of the american public health association to the governing council, 1964-1965." American journal of public health and the nation's health vol. 56,1 (1966): 106-12. doi: https://doi.org/10.2105/ajph.56.1.106
Porterfield JD. Report of the chairman of the executive board of the american public health association to the governing council, 1964-1965. Am J Public Health Nations Health. 1966 Jan;56(1):106-12. doi: 10.2105/ajph.56.1.106. PMID: 18018107; PMCID: PMC1256790.
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