Formats: Text / Genre: 3 selected - Digital Collections - National Library of Medicine Search Results

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1. Key punch machine for coding diseases and defects onto statistical cards

Publication:: United States. Government Printing Office, 1919
Archival Collection:: Risk Factors: Measuring and Rating Health, Illness, and Mortality (Profiles in Science)

2. A sorting machine for coded statistical cards

Publication:: United States. Government Printing Office, 1919
Archival Collection:: Risk Factors: Measuring and Rating Health, Illness, and Mortality (Profiles in Science)