1977
January January; 5 (1): 1 - 114	February February; 5 (2): 115 - 256	March March; 5 (3): 257 - 386
April April; 5 (4): 387 - 503	May May; 5 (5): 505 - 550	June June; 5 (6): 551 - 676
July July; 6 (1): 1 - 89	August August; 6 (2): 91 - 185	September September; 6 (3): 187 - 317
October October; 6 (4): 319 - 438	November November; 6 (5): 439 - 544	December December; 6 (6): 545 - 649