1980
January January; 11 (1): 1 - 109	February February; 11 (2): 111 - 204	March March; 11 (3): 205 - 308
April April; 11 (4): 309 - 439	May May; 11 (5): 441 - 540	June June; 11 (6): 541 - 754
July July; 12 (1): 1 - 134	August August; 12 (2): 135 - 295	September September; 12 (3): 297 - 481
October October; 12 (4): 483 - 635	November November; 12 (5): 637 - 723	December December; 12 (6): 725 - 809