If your looking for basic wolf trapping info, here is a link to the Alaska Trappers Assoc. they have a 128 page handbook with a 34 min. DVD on foot trapping and snaring wolves. A good educational tool for those looking to trap their first wolf next fall. I have the DVD and think its has good basic info and easy to understand.
alaskatrappers.org/handbook.html#ATA_Wolf_Trapping_Manual