Subject
Public Health, Environmental and Occupational Health,Epidemiology
Reference9 articles.
1. Beilly, J. S., Greenberg, M. W., Aaron, J. B., and Peck, S. J. (1952).
2. Colmeiro-Laforet, K. (1953). Arch. Gyndk., 183, 167.
3. Gibson, J. R., and McKeown, T. (1950). British Journal of Social
4. Ibid., 5 177.
5. Johnson, H. W. (1945). Amer. J. Obstet. Gynec., 50, 248.