00648naa#a2200169#i#450# EN\\bibl\100772 20260207003928.6 2307-7476 20250630b2025####ek#y0engy0150####ca RU ANALYSIS OF LONG-TERM FLUCTUATIONS IN THE PUR RIVER WATER LEVEL TO ENSURE NAVIGATION SAFETY Journal article Saint-Petersburg Saint-Petersburg University of State Fire Service of Emercom of Russia 2025 16 с. Journal article local Гидросфера. Вода в целом. Общая гидрология. 556 Volkova Nadezhda A. journals.igps.ru