TY JOUR TI The Choice of Intermediary When Solving the First Positional Tasks KW descriptive geometry KW the first positional task KW the intermediary KW the cross-section surface KW the disintegration of the line of the intersection. JO Geometry & Graphics AU Ivanov, G.. AU Dmitrieva, I.M. PY 2015 IS 3 PB INFRA-M Academic Publishing LLC.