Abstract
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References
1.
Graham Forbes
, 1932 , " Diphtheria, Its Distribution and Prevention ."
2.
Dykes, A. L., I9I4, October Medical Press and Circular.
3.
Newman, Sir G.
, 1932 , " Annual Report of Chief Medical Officer to the Ministry of Health ."
4.
Topley
, 1933 , " An Outline of Immunity ."
5.
Ibid.
6.
Greenwood
, 1932 , " Epidemiology, Historical and Experimental "