00636naa#a2200181#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200011400102210010100216215001100317608002700328675006700355700001500422856001700437EN\\bibl\8178720241212001147.4##a2412-9186##a20150625b2015####ek#y0engy0150####ca0#aRUS##aRU1#aDevelopment of signaling, interlocking and line-block in the pre-reform period (before 1861)eJournal article1#aSaint-PetersburgcFSBEI HE "Emperor Alexander I St. Petersburg State Transport University"d2015##a17 с.##aJournal article2local##aМеры безопасности. Сигналы. 656.25zRUS#1aLupalgN V4#aatjournal.ru