Não informado. (2020). American Engineer and Railroad Journal. M.N. Forney.
Lua i Stíl Chicago (17ú heag.)Não informado. American Engineer and Railroad Journal. New York: M.N. Forney, 2020.
Lua MLA (8ú heag.)Não informado. American Engineer and Railroad Journal. M.N. Forney, 2020.
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