1981
January January; 54 (637): 1 - 90	February February; 54 (638): 91 - 178	March March; 54 (639): 179 - 276
April April; 54 (640): 277 - 376	May May; 54 (641): 377 - 440	June June; 54 (642): 443 - 554
July July; 54 (643): 555 - 642	August August; 54 (644): 643 - 718	September September; 54 (645): 719 - 830
October October; 54 (646): 831 - 926	November November; 54 (647): 927 - 1026	December December; 54 (648): 1027 - 1125