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Archive of 1989 Online Issues:

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January 1989; 44 (1): B1 - S44
 March 1989; 44 (2): B27 - S86
May 1989; 44 (3): B53 - S128
 July 1989; 44 (4): B77 - S168
September 1989; 44 (5): B107 - S204
 November 1989; 44 (6): 5 - S240