Mr. John Spear's report to the Local Government Board upon a re-inspection of the registration sub-district of Dartford, and upon the continued prevalence in the district of diphtheria / [John Spear].

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Mr. John Spear's report to the Local Government Board upon a re-inspection of the registration sub-district of Dartford, and upon the continued prevalence in the district of diphtheria / [John Spear]. Public Domain Mark. Source: Wellcome Collection.