For citations:

Chuprikova-Krynskaya E.R. Nikolay Karazin’s Graphic Series for the Amu Darya and Samara Expeditions of 1874 and 1879. Observatory of Culture. 2021;18(4):378-389. (In Russ.) https://doi.org/10.25281/2072-3156-2021-18-4-378-389