00549naa#a2200169#i#450# EN\INFRA-M\bibl\85523 20251221125152.7 2500-0497 20240627b2024####ek#y0engy0150####ca RU Permanent education reform and its implications 
for descriptive geometry Journal article Moscow INFRA-M Academic Publishing LLC. 2024 7 с. Journal article local Начертательная геометрия. 514.18 Sal'kov N. A. zh-szf.ru