Slick Vik Posted May 5, 2014 Share Posted May 5, 2014 http://editorialexpress.com/cgi-bin/conference/download.cgi?db_name=IIPF62&paper_id=11Fascinating Quote Link to comment Share on other sites More sharing options...
Slick Vik Posted May 5, 2014 Author Share Posted May 5, 2014 If that's too scientific here is an explanationhttp://transportationist.org/2013/01/09/transportation_benefits_too_li/ Quote Link to comment Share on other sites More sharing options...
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