00636naa#a2200181#i#450# EN\\bibl\81787 20241105072903.2 2412-9186 20150625b2015####ek#y0engy0150####ca RUS RU Development of signaling, interlocking and line-block in the pre-reform period (before 1861) Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2015 17 с. Journal article local Меры безопасности. Сигналы. 656.25 RUS Lupal N V atjournal.ru