Casual Contact and the Risk of HIV Infection: A Report. (July 1989.)
Washington, D.C.: American Public Health Association, July 1989. 10 p.
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Decree No. 175/1989 of 18 July 1989 Approving the Charter of the Rights and Obligations of Patients and Users of the Basque Health Service Unknown creator (Spain (Basque Autonomous Community), 1992)