1940
January January; 26 (1): 1 - 188	February February; 26 (2): 189 - 368	March March; 26 (3): 369 - 564
April April; 26 (4): 565 - 734	May May; 26 (5): 735 - 940	June June; 26 (6): 941 - 1129
July July; 27 (1): 1 - 160	August August; 27 (2): 161 - 344	September September; 27 (3): 345 - 531
October October; 27 (4): 533 - 706	November November; 27 (5): 707 - 842	December December; 27 (6): 843 - 1010