00578naa#a2200181#i#450# EN\\bibl\83925 20241110131759.7 2782-1927 20220626b2022####ek#y0engy0150####ca ENG RU DEMOGRAPHIC RISKS, CHALLENGES, PROBLEMS AND DISPARITIES IN THE REGIONS OF THE CENTRAL DISTRICT OF RUSSIA Journal article Yaroslavl Yaroslavl State Technical University 2022 14 с. Journal article local Berendeeva Alla B Berendeeva Olga Sergeevna chemintech.ru