Pickford, Michael J.

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Lenard, T.M. & Pickford, M.J. (2005). The Digital Economy Fact Book. Seventh Edition, 2005. Washington, D.C.: The Progress & Freedom Foundation.
Adkinson Jr., W.F., Lenard, T.M. & Pickford, M.J. (2004). The Digital Economy Fact Book. Sixth Edition, 2004. Washington, D.C.: The Progress & Freedom Foundation.

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