00642naa#a2200181#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200011300102210010100215215001100316608002700327675006700354700002200421856001700443EN\\bibl\8187720241124021411.7##a2412-9186##a20171225b2017####ek#y0engy0150####ca0#aRUS##aRU1#aSignals and interlocking development during imperialism (1906-1917). Part 4: Safety deviceseJournal article1#aSaint-PetersburgcFSBEI HE "Emperor Alexander I St. Petersburg State Transport University"d2017##a10 с.##aJournal article2local##aМеры безопасности. Сигналы. 656.25zRUS#1aLupalgNicolay V 4#aatjournal.ru