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1989
January January; 28 (1): 1 - 72	February February; 28 (2): 73 - 156	March March; 28 (3): 157 - 236
April April; 28 (4): 237 - 298	May May; 29 (1): 1 - 78	June June; 29 (2): 81 - 160
July July; 29 (3): 161 - 238	August August; 29 (4): 239 - 298	September September; 30 (1): 1 - 87
October October; 30 (2): 89 - 159	November November; 30 (3): 161 - 238	December December; 30 (4): 239 - 302