1989
January January; 55 (1): 1 - 268	February February; 55 (2): 269 - 542	March March; 55 (3): 543 - 770
April April; 55 (4): 771 - 1047	May May; 55 (5): 1049 - 1321	June June; 55 (6): 1323 - 1663
July July; 55 (7): 1665 - 1855	August August; 55 (8): 1857 - 2111	September September; 55 (9): 2113 - 2430
October October; 55 (10): 2431 - 2737	November November; 55 (11): 2739 - 3034	December December; 55 (12): 3035 - 3255