1980
January January; 33 (1): 1 - 571	February February; 33 (2): 573 - 926	March March; 33 (3): 927 - 1235
April April; 34 (1): 1 - 303	May May; 34 (2): 305 - 582	June June; 34 (3): 583 - 802
July July; 35 (1): 1 - 275	August August; 35 (2): 277 - 581	September September; 35 (3): 583 - 978
October October; 36 (1): 1 - 297	November November; 36 (2): 299 - 631	December December; 36 (3): 633 - 896