00548naa#a2200181#i#450# EN\\bibl\35270 20250508235827.4 1999-9917 20181228b2018####ek#y0engy0150####ca RUS RU THE COSTS AND BENEFITS OF THE LABOUR OF CONVICTS: PROBLEMS OF STATISTICAL ANALYSIS Journal article Ryazan Academy of the FPS of Russia 2018 7 с. Journal article local . 343.823 RUS Chernyshov Il’ya Nikolaevich mcp.editorum.ru