00583naa#a2200181#i#450# EN\\bibl\112428 20260119013921.1 2311-1402 20201225b2020####ek#y0engy0150####ca RUS RU Organization of river transport operations on small rivers of the Tyumen region in the first half of the 1960s Journal article Nizhnevartovsk Nizhnevartovsk State University 2020 6 с. Journal article local История. 93/94 RUS Knizhnikov V A vestnik.nvsu.ru