title: [3 unpublished works of I. I. Mechnikov].
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D008374:Manuscripts, Medical as Topic; D012425:Russia (Pre-1917); D015046:Zoology / Q000266:history
vernacular_title: O trekh nenapechatannykh rabotakh I. I. Mechnikova.