1990
January January; 34 (1): 1 - 182	February February; 34 (2): 183 - 379	March March; 34 (3): 381 - 497
April April; 34 (4): 499 - 679	May May; 34 (5): 681 - 941	June June; 34 (6): 943 - 1301
July July; 34 (7): 1303 - 1462	August August; 34 (8): 1463 - 1622	September September; 34 (9): 1623 - 1863
October October; 34 (10): 1865 - 2041	November November; 34 (11): 2043 - 2289	December December; 34 (12): 2291 - 2448