00569naa#a2200181#i#450# EN\\bibl\30032 20240424175108.3 2071-7318 20190725b2019####ek#y0engy0150####ca RUS RU RESEARCH EFFICIENCY OF NATURAL VENTILATION SYSTEM OF APARTMENT BUILDING Journal article Belgorod Belgorod State Technological University named after V.G. Shukhov 2019 7 с. Journal article local Abdrazakov F. K. Povarov A. V. bulletinbstu.editorum.ru