 | Ivan Mikhailovich Gubkin (Russian: Ива́н Миха́йлович Гу́бкин; September 21 [O.S. September 9] 1871 – 21 April 1939) was a Soviet and Russian geologist... 5 KB (507 words) - 07:11, 26 February 2024 |
| Ivan Mikhailovich Gubkin (Russian: Ива́н Миха́йлович Гу́бкин; September 21 [O.S. September 9] 1871 – 21 April 1939) was a Soviet and Russian geologist... 5 KB (507 words) - 07:11, 26 February 2024 |