1968
January January; 8 (1): 1 - 147	February February; 8 (2): 153 - 302	March March; 8 (3): 305 - 388
April April; 8 (4): 391 - 513	May May; 8 (5): 515 - 664	June June; 8 (6): 669 - 772
July July; 8 (7): 4 - 875	August August; 8 (8): 879 - 971	September September; 8 (9): 973 - 1053
October October; 8 (10): 1055 - 1197	November November; 8 (11): 1201 - 1398	December December; 8 (12): 1401 - 1533