Linea principale Shin'etsu (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Linea principale Shin'etsu" in Italian language version.

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ide.go.jp

d-arch.ide.go.jp

(EN) Katsumasa Harada, Technological independence and progress of standardization in the Japanese railways, su d-arch.ide.go.jp, JETRO, 1981. URL consultato il 2 gennaio 2009.
«it was eventually decided to build the track at a steep grade of 66.7/1,000»