1977
January January; 33 (1): 1 - 218	February February; 33 (2): 219 - 488	March March; 33 (3): 489 - 743
April April; 33 (4): 745 - 1018	May May; 33 (5): 1019 - 1236	June June; 33 (6): 1237 - 1297
July July; 34 (1): 1 - 109	August August; 34 (2): 111 - 246	September September; 34 (3): 247 - 336
October October; 34 (4): 337 - 460	November November; 34 (5): 461 - 615	December December; 34 (6): 617 - 862