00526naa#a2200169#i#450# EN\INFRA-M\bibl\398 20251218195234.4 2308-4898 20130725b2013####ek#y0engy0150####ca RUS RU Descriptive geometry course reorganization as the actual task of graphics chairs development Journal article Moscow INFRA-M Academic Publishing LLC. 2013 2 с. Journal article local Kheyfets Aleksandr L'vovich zh-szf.ru