00629naa#a2200181#i#450# EN\\bibl\66209 20250103170835.5 2074-1618 20151225b2015####ek#y0engy0150####ca RUS RU ROLE OF VISUALIZATION IN LEARNING MATHEMATICS STUDENTS IN HIGHER HEBNEH INSTITUTIONS OF POWER STRUCTURES OF THE RUSSIAN FEDERATION Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2015 3 с. Journal article local Efimova A B Gorshkova E E journals.igps.ru