http://www.gatx.com/rail/index.asp
http://www.boxcarservices.com/now/index.html
http://www.gbrx.com/page.php?view=BOX_CARS
http://www.ttx.com/
http://www.tiogacentral.com/equipment.php
http://www.spikesys.com/Trains/rep_mrks.html
http://www.rrpicturearchives.net/