SARAPULOV, A.N. ABOUT THE TIME OF APPEARANCE OF PLOUGH FARMING IN THE PERM CIS-URALS. Perm Federal Research Centre Journal, [S. l.], n. 3, p. 37–41, 2017. Disponível em: https://journal.permsc.ru/index.php/pscj/article/view/PSCJ2016n3p6. Acesso em: 14 may. 2026.