Chuvashov 2010–Russian. The naming of the Permian System
journal contributionposted on 04.05.2021, 12:34 by Michael J. Benton, Andrey G. Sennikov
Original text from Chuvashov, B.I. 2010. The Urals and Yekaterinburg through the eyes of a foreigner in the middle of the 19th century. Vestnik Permskovo Universiteta, Geologiya 1(9), 79â€“89. (In Russian).