00575naa#a2200181#i#450# EN\INFRA-M\bibl\3853 /en/manage/index 20250716080038.3 2306-1731 20140910b2014####ek#y0engy0150####ca RUS RU Prospects of Polytechnic Principle of Learning in Technological Training of Pupils of 5-7 Grades Journal article Moscow INFRA-M Academic Publishing LLC. 2014 2 с. Journal article local Terentyev Sergey test.editorum.ru /en/manage/index