1968
January January; 41 (481): 1 - 80	February February; 41 (482): 81 - 160	March March; 41 (483): 161 - 240
April April; 41 (484): 241 - 320	May May; 41 (485): 321 - 400	June June; 41 (486): 401 - 480
July July; 41 (487): 481 - 560	August August; 41 (488): 561 - 640	September September; 41 (489): 641 - 728
October October; 41 (490): 729 - 808	November November; 41 (491): 809 - 884	December December; 41 (492): 885 - 958