In copyright
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Credit
Beschouwingen over de oorzaken der groote kindersterfte (meer speciaal in he 1e levensjaar) en de middelen die verbetering daarvan kunnen leiden : met statistische oversichten van huwelijken, de geboorten en de sterfte in Nederland van 1840 tot 1900 / door E.J. Jonkers. In copyright. Source: Wellcome Collection.