W. H. Vital Statistics: A memorial Volume of Selections from the Reports and Writings of William Farr. Edited by Noel A Humphreys. London 1885. XXIV + 563 Sider. (30 sh.). nt [Internet]. 1. januar 1886 [henvist 14. juli 2024];4. Tilgængelig hos: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/65205