1970
January January; 1 (1): 1 - 138	February February; 1 (2): 139 - 213	March March; 1 (3): 215 - 320
April April; 1 (4): 321 - 425	May May; 1 (5): 427 - 512	June June; 1 (6): 513 - 608
July July; 2 (1): 1 - 122	August August; 2 (2): 123 - 221	September September; 2 (3): 223 - 349
October October; 2 (4): 351 - 521	November November; 2 (5): 523 - 689	December December; 2 (6): 691 - 820