1975
January January; 1 (1): 1 - 117	February February; 1 (2): 119 - 242	March March; 1 (3): 243 - 338
April April; 1 (4): 339 - 395	May May; 1 (5): 397 - 489	June June; 1 (6): 491 - 535
July July; 2 (1): 1 - 75	August August; 2 (2): 77 - 151	September September; 2 (3): 153 - 276
October October; 2 (4): 277 - 360	November November; 2 (5): 361 - 464	December December; 2 (6): 465 - 560