TY JOUR TI METHODS OF QUESTIONNAIRE STUDY OF CONVICTS’ OPINIONS ON EDUCATIONAL WORK WITH THEM KW questionnaire survey KW convicts KW imprisonment KW correction KW educational work KW correctional institution JO Man: crime and punishment AU Cherekhovich, M.. AU Shcherbakov, G.V. PY 2019 IS 27 PB Academy of the FPS of Russia