@book {TN_libero_mab2,
author = { Michajlov, Aleksandr F. AND Efimov, Gennadij K. },
title = { Ochrana truda v chozjajstve signalizacii i svjazi },
publisher = {Transport},
year = {1979},
address = { Moskva },
url = { http://slubdd.de/katalog?TN_libero_mab2 }
}
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