00468naa#a2200169#i#450# EN\INFRA-M\bibl\1065 20240426014950.5 2308-4898 20131203b2013####ek#y0engy0150####ca RUS RU Gaspard Monge’s Descriptive Geometry Course Journal article Moscow INFRA-M Academic Publishing LLC. 2013 4 с. Journal article local Sal'kov N. A. riorpub.com