00565naa#a2200181#i#450# EN\INFRA-M\bibl\93859 20251212173257.5 2308-4898 20240927b2024####ek#y0engy0150####ca RU On the Role of the First Lecture on Descriptive Geometry Journal article Moscow INFRA-M Academic Publishing LLC. 2024 7 с. Journal article local Начертательная геометрия. 514.18 Sal'kov N. A. Kadykova Nina S. naukaru.ru