weight pulling
Beginning - Training
http://www.pulldoggies.com/weight_pull_training.htm
International Weight Pulling Association
http://www.iwpa.net/
great training info
http://www.harnessesbycarol.com/WEIGHT%20PULL%20TRAINING.pdf
Working Dog
http://www.workingdogs.com/weightpulling.htm
Alaskan Malamute Club Of America
http://www.alaskanmalamute.org/working/workgam.asp