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1981
January January; 88 (1): 9 - 153	February February; 88 (2): 161 - 316	March March; 88 (3): 321 - 469
April April; 89 (1): 1 - 177	May May; 89 (2): 181 - 325	June June; 89 (3): 329 - 456
July July; 90 (1): 1 - 142	August August; 90 (2): 145 - 306	September September; 90 (3): 309 - 452
October October; 91 (1): 1 - 173	November November; 91 (2): 179 - 362	December December; 91 (3): 367 - 530