A Social Factor Associated with the Severity of Periodontal Disease

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References

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Russell, A.L. : Some Epidemiological Characteristics of Periodontal Disease in a Series of Urban Populations, J. Periodont. 28: 294, 1957.

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Russell, A.L. , and Elvove, E. : Domestic Water and Dental Caries. VII. A Study of the Fluoride-Dental Caries Relationship in an Adult Population, Pub . Health Rep. 66: 1389-1401, 1951 .