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Valentin Popov
Riga Technical University
Institute of Railway Transport
Indrika str.8, 309,
Work phone: +371-67089652
E-mail: popovs@latnet.lv
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Valentin Popov
Riga Technical University
Institute of Railway Transport
Indrika str.8, 309,
Work phone: +371-67089652
E-mail: popovs@latnet.lv