1975
January January; 11 (1): 1 - 213	February February; 11 (2): 215 - 416	March March; 11 (3): 417 - 608
April April; 11 (4): 609 - 876	May May; 11 (5): 877 - 1161	June June; 11 (6): 1163 - 1413
July July; 12 (1): 1 - 224	August August; 12 (2): 225 - 448	September September; 12 (3): 449 - 697
October October; 12 (4): 699 - 937	November November; 12 (5): 939 - 1229	December December; 12 (6): 1231 - 1480