Bell JA (1941)

Pertussis prophylaxis with two doses of alum-precipitated vaccine. Public Health Reports 56:1535-1546.
In 1941, the American physician Joseph Bell, in an exceptionally clearly written report of his trial of whooping cough vaccine, reported his use of random sampling numbers to generate unbiased comparison groups.

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  Joseph Asbury Bell (1904-1968)

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