00504naa#a2200181#i#450# EN\INFRA-M\bibl\11851 20241002162725.3 2305-7807 20160418b2016####ek#y0engy0150####ca RUS RU Volunteering As a Labour Economics Category Journal article Moscow INFRA-M Academic Publishing LLC. 2016 6 с. Journal article local Ivanov A. Ivanova-Shvets Lyudmila zh-szf.ru