00659naa#a2200181#i#450# EN\\bibl\68475 20241123002853.6 2218-130X 20180325b2018####ek#y0engy0150####ca RUS RU THEORETICAL AND METHODOLOGICAL FOUNDATIONS OF PROFESSIONALLY DIRECTED TRAINING BY MATHEMATICS AND NATURAL SCIENCE SUBJECTS IN UNIVERSITIES OF EMERCOM OF RUSSIA Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2018 6 с. Journal article local Medvedeva L V Kalinina E S journals.igps.ru