00451naa#a2200169#i#450# EN\INFRA-M\bibl\397 20250105190429.7 2308-4898 20130725b2013####ek#y0engy0150####ca RUS RU Descriptive Geometry until 1917 Journal article Moscow INFRA-M Academic Publishing LLC. 2013 2 с. Journal article local Sal'kov N. A. zh-szf.ru