1981
January January; 71 (1): 1 - 41	February February; 71 (2): 54 - 114	March March; 71 (3): 119 - 171
April April; 71 (4): 175 - 231	May May; 71 (5): 237 - 280	June June; 71 (6): 287 - 343
July July; 71 (7): 349 - 403	August August; 71 (8): 409 - 459	September September; 71 (9): 465 - 525
October October; 71 (10): 529 - 585	November November; 71 (11): 591 - 656	December December; 71 (12): 661 - 699