00673naa#a2200181#i#4500001001500000005001700015011001400032100004100046101000800087102000700095200014400102210010100246215001100347608002700358675006700385700002200452856001700474EN\\bibl\8186820241121203919.4##a2412-9186##a20170925b2017####ek#y0engy0150####ca0#aRUS##aRU1#aSignals and interlocking development during imperialism (1906-1917). Part 3: Mechanical interlocking of points and signalseJournal article1#aSaint-PetersburgcFSBEI HE "Emperor Alexander I St. Petersburg State Transport University"d2017##a11 с.##aJournal article2local##aМеры безопасности. Сигналы. 656.25zRUS#1aLupalgNicolay V 4#aatjournal.ru