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Government Manual, United States<\/a>, 2009-2010 [750 Pages, 2.8MB]<\/p>\n Investigators\u2019 Guide to Sources of Information<\/a>, April 1997 [750 Pages, 580 kb] – This 1997 Investigators\u2019 Guide to Sources of Information is published as a service to the investigative community by GAO\u2019s Office of Special Investigations. It is intended to be a useful investigative tool for identifying sources of information about people, property, business, and finance. This year\u2019s guide is organized so that all of the information about a single source is located in a single definitive category. An index has been addedto locate sources of information about a topic that may be discussed inone or more places in the guide. Finally, to make the guide useful in an increasingly electronic environment, we have added Internet addresses wherever possible and a chapter on how to use the Internet to gather information valuable to the investigative process.<\/p>\n Guide to Air Force Historical Literature, 1943-1983<\/a>, 1985 [260 Pages, 21MB]<\/p>\n A Reference Guide to Selected Historical Documents Relating to the National Security Agency\/Central Security Service, 1931 – 1985<\/a> [114 Pages, 76MB]<\/p>\nTransfer Logs<\/h3>\n