1973
January January; 63 (1): 1 - 29	February February; 63 (2): 35 - 76	March March; 63 (3): 81 - 105
April April; 63 (4): 119 - 151	May May; 63 (5): 165 - 208	June June; 63 (6): 217 - 276
July July; 63 (7): 287 - 349	August August; 63 (8): 359 - 407	September September; 63 (9): 423 - 470
October October; 63 (10): 481 - 549	November November; 63 (11): 394 - 632	December December; 63 (12): 639 - 693