00709naa#a2200181#i#450# EN\\bibl\81819 20241123170704.6 2412-9186 20160625b2016####ek#y0engy0150####ca RUS RU Development of signalling, centralization and blocking devices during the period of industrial capitalism (1861-1900). Part 4: Centralization of switches and signals Journal article Saint-Petersburg FSBEI HE "Emperor Alexander I St. Petersburg State Transport University" 2016 10 с. Journal article local Меры безопасности. Сигналы. 656.25 RUS Lupal N V atjournal.ru