1977
January January; 23 (1): 1 - 98	February February; 23 (2): 99 - 198	March March; 23 (3): 199 - 300
April April; 23 (4): 301 - 390	May May; 23 (5): 391 - 494	June June; 23 (6): 495 - 602
July July; 24 (1): 1 - 98	August August; 24 (2): 99 - 200	September September; 24 (3): 201 - 296
October October; 24 (4): 297 - 396	November November; 24 (5): 397 - 496	December December; 24 (6): 497 - 605