The preparation of this annotated bibliography was guided by a desire to include all of the problem gambling research articles that have been published in the English language. Some exceptions were made for articles published in other languages but for which an English abstract was available that provided sufficient details about the study. All studies were included, regardless of their methodological quality. In some cases, studies utilizing the same treated sample but providing additional results of the study were included. The studies are listed chronologically, from 1966 to 2005.