1989
January January; 171 (1): 1 - 624	February February; 171 (2): 625 - 1233	March March; 171 (3): 1235 - 1774
April April; 171 (4): 1775 - 2264	May May; 171 (5): 2265 - 2913	June June; 171 (6): 2915 - 3589
July July; 171 (7): 3591 - 4104	August August; 171 (8): 4105 - 4530	September September; 171 (9): 4531 - 5237
October October; 171 (10): 5239 - 5761	November November; 171 (11): 5763 - 6395	December December; 171 (12): 6397 - 6877