TI  - Pneumococcus types in south africa: A study of their occurrence and distribution in the population and the effect thereon of prophylactic inoculation
PT  - JOUR
DP  - 1939
TA  - Journal of the American Medical Association
pages = {81},
VI  - 112
IP  - 1
AID  - 10.1001/jama.1939.02800010083030 [doi]
4100  - http://dx.doi.org/10.1001/jama.1939.02800010083030
SO  - Journal of the American Medical Association January 7, 1939 112(1):81