00582naa#a2200169#i#450# EN\\bibl\82784 20241104020950.1 2588-0071 20240328b2024####ek#y0engy0150####ca RU Threshold values of key socio-demographic indicators in modern Russia Journal article Nizhny Novgorod Nizhny Novgorod Academy of the Ministry of the Interior of Russia 2024 9 с. Journal article local Krivorotov Vadim Vadim Vasil'evich Kalina Aleksey Vladimirovich namvd.editorum.ru