00470naa#a2200145#i#450# EN\INFRA-M\bibl\14623 20260604213552.4 20250114b2025####ek#y0engy0150####ca RU THE CHALLENGE OF ASSESSING THE EFFICIENCY OF PORTS: LACK OF DIGITAL DATA Conference article/thesis Moscow INFRA-M Academic Publishing LLC. 2025 5 с. Conference article/thesis local Samsonova N. A. zh-szf.ru