Washington : American Enterprise Institute for Public Research, [1978]

Internet Archive >> None

Chicago : Center for Intellectual Property in the Digital Environment, Association of College and Research Libraries, 2005.

Internet Archive >> None

Acton, Mass., Pub. Sciences Group [1974]

Internet Archive >> None

Washington, D.C. : American Enterprise Institute for Public Policy Research, c1980.

Internet Archive >> None

Lexington, Mass. : Lexington Books, c1977.

Internet Archive >> None

Boulder, Colo. : Published by Westview Press for the American Association for the Advancement of Science, 1978.

Internet Archive >> None

Washington, D.C. : Urban Institute Press, 1999.

Internet Archive >> None

Washington, D.C. : Brookings Institution, c1983.

Internet Archive >> None

Boston, Mass. : Kluwer Academic Publishers, c1999.

Internet Archive >> None

Omaha, Neb. : Creighton University Press, Association of Jesuit University Presses, c1996.

Internet Archive >> None