1964
January January; 49 (1): 1 - 173	February February; 49 (2): 181 - 366	March March; 49 (3): 367 - 540
April April; 49 (4): 541 - 738	May May; 49 (5): 739 - 893	June June; 49 (6): 895 - 1007
July July; 50 (1): 1 - 229	August August; 50 (2): 231 - 296	September September; 50 (3): 297 - 507
October October; 50 (4): 509 - 782	November November; 50 (5): 783 - 1217	December December; 50 (6): 1219 - 1453