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Start Over You searched for: Subjects Comorbidity Remove constraint Subjects: Comorbidity Publication Year 1900 to 1999 Remove constraint Publication Year: <span class="from" data-blrl-begin="1900">1900</span> to <span class="to" data-blrl-end="1999">1999</span>

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1. Epidemic respiratory disease: the pneumonias and other infections of the respiratory tract accompanying influenza and measles

2. Statistical treatment of causes of death: cooperative work relative to treatment of jointly returned causes and the revision of the international classification : plan proposed by the Committee on Demography of the American Public Health Association