http://www.gearfordogs.com/shop.cfm?groupid=Harnesses

http://www.nordkyn.com/

http://www.driversalacart.com/

http://www.geocities.com/wilczekwoodworks/page6.html

http://www.blackicedogsledding.com/page6.html

http://www.leatherleashes.com/harness.htm#cart

http://www.fairing.com/002cromolysteel_plain-r.htm

http://www.airpartsinc.com/catalog-gif/Page05.htm

http://neddc.org/draftrules/draftrules.php#Section%201%20–%20Application

New England Drafting and Driving Club Rules for Trials

http://www.wayeh.com/aboutsleddogs/sledding.htm

Very humorous insight into the existence of a dog-carting enthusiast.