00594naa#a2200181#i#450# EN\\bibl\6333 20251225114220.4 1995-042X 20150722b2015####ek#y0engy0150####ca RUS RU Methodical approaches to research of a condition of a tourist route network (on the example of the Volga Federal District) Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 0 с. Journal article local Sarancha Mikhail Golubeva Oksana zh-szf.ru