Free Development of the Activities on Improving Working Conditions for the Employees of Polyethylene Production in PJSC «Ufaorgsintez» Fedosov A.V., Vadulina N.V., Abdrakhmanov N.Kh., Danieva I.R., Valeeva R.R. DOI: 10.24000/0409-2961-2020-6-84-88 Year: 2020 Issue num: 6 more