00638naa#a2200169#i#450# EN\\bibl\7804 20241105174741.2 20221019b2022####ek#y0engy0150####ca RU PAST AND PRESENT OF THE ULAN-BATOR RAILWAY Conference article/thesis Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2022 4 с. Conference article/thesis local Эксплуатация железнодорожного транспорта. 656.2 Mendsayhan Ganbayar Nikiforova Guzel' Islyamovna atjournal.ru