1989
January January; 27 (1): 1 - 230	February February; 27 (2): 231 - 375	March March; 27 (3): 377 - 597
April April; 27 (4): 599 - 799	May May; 27 (5): 801 - 1144	June June; 27 (6): 1145 - 1430
July July; 27 (7): 1431 - 1705	August August; 27 (8): 1707 - 1918	September September; 27 (9): 1919 - 2144
October October; 27 (10): 2145 - 2401	November November; 27 (11): 2403 - 2626	December December; 27 (12): 2627 - 2894