Ссылка для цитирования (ENG)
Mokeev Anton Borisovich , Voloshinova I. V. Geological surveys by Russian mining engineers in the last quarter of the 19th century Social Sciences . 2016. №11. pp. 29-35. http://docsdrive.com/pdfs/medwelljournals/sscience/2016/29-35.pdf
