車内信号 (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "車内信号" in Japanese language version.

refsWebsite

Global rank Japanese rank

741^st place

1,856^th place

9,784^th place

low place

low place

5,449^th place

9,849^th place

low place

1,690^th place

6,500^th place

dot.gov

United States Federal Railroad Administration (2004年12月15日). “Positive Train Control Overview”. 2007年1月10日閲覧。

Automatic Train Control in Rail Rapid Transit, United States Congress Office of Technology Assessment, May 1976 NTIS order #PB-254738 http://www.princeton.edu/~ota/disk3/1976/7614/7614.PDF