Du masque opératoire. Thèse presentée et publiquement soutenue à la Faculté de Médecine du Montpellier....

The medical thesis on medical and surgical masks by a woman medical student at Montpellier, who, as indicated on the title page, was born in Witebsk, Russia in 1876. She was also characterized as "Mlle." The thesis includes some remarkable illustrations of early mask styles, and a bibliography of the earliest literature on the topic.
Digital facsimile from the Internet Archive at this link.