00528naa#a2200193#i#450# EN\\bibl\12374 20260714101225.2 2071-2367 20160626b2016####ek#y0engy0150####ca RUS RU Demographic reproduction of young generation of the Orel region Journal article Moscow RANEPA 2016 15 с. Journal article local Prokazina Natalya Merkulov Pavel Perevozkin Leonid naukaru.ru