http://www.helium.com/knowledge/253483-differences-between-pure-monopoly-and-an-oligopoly.xml Helium.com > Business (Other) > Differences between pure monopoly and an oligopoly en-us Copyright Helium.com Tue, 07 Jul 2009 20:02:43 GMT Tue, 07 Jul 2009 20:02:43 GMT