1989
January January; 57 (1): 1 - 301	February February; 57 (2): 303 - 660	March March; 57 (3): 661 - 1010
April April; 57 (4): 1011 - 1350	May May; 57 (5): 1351 - 1637	June June; 57 (6): 1639 - 1871
July July; 57 (7): 1873 - 2265	August August; 57 (8): 2267 - 2590	September September; 57 (9): 2591 - 2930
October October; 57 (10): 2931 - 3260	November November; 57 (11): 3261 - 3669	December December; 57 (12): 3671 - 3950