1981
January January; 52 (1): 1 - 170	February February; 52 (2): 171 - 380	March March; 52 (3): 381 - 600
April April; 52 (4): 601 - 834	May May; 52 (5): 835 - 1052	June June; 52 (6): 1053 - 1270
July July; 53 (1): 1 - 224	August August; 53 (2): 239 - 460	September September; 53 (3): 465 - 672
October October; 53 (4): 675 - 898	November November; 53 (5): 899 - 1102	December December; 53 (6): 1105 - 1332