00589naa#a2200181#i#450# EN\\bibl\2161 20240509034027.4 1999-5644 20140527b2014####ek#y0engy0150####ca RUS RU Application of the 2D Didactics Principle to Ecology- and Information-Related Discipline Teaching: A Posteriori Journal article CHERKIZOVO Russian State University of Tourism and Service 2014 7 с. Journal article local Tsekhanovich Olga Byrdin Viktor rguts.editorum.ru