@misc{Petri_Èduard_Ûl'evič_(1854–1899)_Učebnyj_1912, author={Petri, Èduard Ûl'evič (1854–1899)}, copyright={Public Domain}, address={S.-Peterburg}, howpublished={online}, year={1912}, publisher={Izdanie T-va A. F. Marksa}, language={rus}, title={Učebnyj geografičeskij atlas : glavnyh" kart" - 49, dopolitel'nyh kart" i čertežej - 140 (na 48 tablicah)}, keywords={geographical atlases, school atlases, 19th century}, }