1989
January January; 134 (1): 1 - 230	February February; 134 (2): 231 - 489	March March; 134 (3): 491 - 721
April April; 134 (4): 723 - 954	May May; 134 (5): 955 - 1173	June June; 134 (6): 1175 - 1376
July July; 135 (1): 1 - 237	August August; 135 (2): 239 - 419	September September; 135 (3): 421 - 583
October October; 135 (4): 585 - 770	November November; 135 (5): 771 - 959	December December; 135 (6): 961 - 1215