Ivan Vtorov
https://ru.wikipedia.org/wiki/%D0%92%D1%82%D0%BE%D1%80%D0%BE%D0%B2,_%D0%98%D0%B2%D0%B0%D0%BD_%D0%9F%D0%B5%D1%82%D1%80%D0%BE%D0%B2%D0%B8%D1%87
Information system "History of Geology and Mining"
https://www1.fips.ru/ofpstorage/Doc/PrEVM/RUNWDB/000/002/019/622/087/2019622087-00001/DOCUMENT.PDF
无数据