1981
January January; 33 (1): 1 - 146	February February; 33 (2): 149 - 288 February; 33 (2 Pt 2): 1 - 321	March March; 33 (3): 289 - 483
April April; 34 (1): 1 - 170	May May; 34 (2): 173 - 350	June June; 34 (3): 353 - 569
July July; 35 (1): 1 - 261	August August; 35 (2): 265 - 555	September September; 35 (3): 557 - 810
October October; 36 (1): 1 - 3141	November November; 36 (2): 321 - 459	December December; 36 (3): 465 - 815