1981
January January; 74 (1): 1 - 78	February February; 74 (2): 85 - 164	March March; 74 (3): 175 - 227
April April; 74 (4): 237 - 319	May May; 74 (5): 327 - 393	June June; 74 (6): 403 - 469
July July; 74 (7): 475 - 559	August August; 74 (8): 567 - 632	September September; 74 (9): 641 - 702
October October; 74 (10): 713 - 777	November November; 74 (11): 787 - 852	December December; 74 (12): 865 - 945