00510naa#a2200169#i#450# EN\INFRA-M\bibl\15211 20240807192109.3 1998-0744 20170220b2017####ek#y0engy0150####ca RUS RU Introduction propaedeutic course visual geometry to ensure the requirements of the FSES Journal article Moscow INFRA-M Academic Publishing LLC. 2017 5 с. Journal article local Maskina M. S. naukaru.ru