1981
January January; 52 (1): 1 - 161	February February; 52 (2): 171 - 372	March March; 52 (3): 381 - 594
April April; 52 (4): 601 - 830	May May; 52 (5): 835 - 1048	June June; 52 (6): 1053 - 1266
July July; 53 (1): 1 - 225	August August; 53 (2): 239 - 458	September September; 53 (3): 465 - 667
October October; 53 (4): 675 - 8982	November November; 53 (5): 899 - 1100	December December; 53 (6): 1105 - 1312