1981
January January; 145 (1): 1 - 673	February February; 145 (2): 675 - 1119	March March; 145 (3): 1121 - 1465
April April; 146 (1): 1 - 433	May May; 146 (2): 435 - 832	June June; 146 (3): 833 - 1174
July July; 147 (1): 1 - 274	August August; 147 (2): 275 - 709	September September; 147 (3): 711 - 1124
October October; 148 (1): 1 - 398	November November; 148 (2): 399 - 743	December December; 148 (3): 745 - 1016