1975
January January; 15 (1): 1 - 224	February February; 15 (2): 225 - 437	March March; 15 (3): 439 - 678
April April; 15 (4): 679 - 1047	May May; 15 (5): 1049 - 1296	June June; 15 (6): 1297 - 1513
July July; 16 (1): 1 - 216	August August; 16 (2): 217 - 462	September September; 16 (3): 463 - 758
October October; 16 (4): 759 - 1094	November November; 16 (5): 1095 - 1355	December December; 16 (6): 1357 - 1688