Chislo zaregistrirovannykh bol'nykh sifilisom za 1888-1894 g. na tysyachu zhiteley. Masshtab 40 verst v angl. dyuyme. [i.e. The number of registered patients with syphilis for 1888-1894 per thousand inhabitants. Map in scale 40 versts in English inch]. St. Petersburg: Ilyin cartography shop, manuscript additions. [1894].