I am editing someone else's thesis. The references include ProQuest citations that look like this (where # = actual digits for an account):
Anderson, L. (2012, Aug 17). Learning the game from the inside out. Sports Illustrated, 1. Retrieved from http://search.proquest.com/docview/1040699841?accountid=#####
Is the number string that appears after .../docview/ the same as the DOI (digital object identifier) or something else?