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1989
January January; 120 (1): 7 - 177, R1 - R13	February February; 120 (2): 183 - 357, R15 - R21	March March; 120 (3): 361 - 536
April April; 121 (1): 1 - 199, R1 - R12	May May; 121 (2): 203 - 402	June June; 121 (3): 405 - 591
July July; 122 (1): 5 - 431	August August; 122 (2): 435 - 604, R1 - R4	September September; 122 (3): 607 - 767, R5 - R6
October October; 123 (1): 1 - 165, R1 - R4	November November; 123 (2): 169 - 359, R5 - R16	December December; 123 (3): 363 - 529, R17 - R20