Magazines
1) http://www.progressiverailroading.com/
2) http://www.railwayage.com/
3) http://www.rtands.com/

Associations
1) http://www.arema.org/eseries/scriptcontent/index.cfm
2) http://www.remsa.org/
3) http://www.aar.org/
4) http://www.iso.org/iso/en/ISOOnline.frontpage

Railways
1) http://www.up.com/
2) http://www.bnsf.com/
3) http://www.csx.com/
4) http://www.nscorp.com
5) http://www.cnrail.com/
6) http://www8.cpr.ca/cms/English/default.htm
7) http://www.fecrwy.com/index2.html

Suppliers
1) http://www.peterbilt.com/index_home.asp
2) http://www.westernstartrucks.com