1973
January January; 33 (1): 1 - 182	February February; 33 (2): 189 - 440	March March; 33 (3): 441 - 632
April April; 33 (4): 633 - 920	May May; 33 (5): 921 - 1138	June June; 33 (6): 1141 - 1566
July July; 33 (7): 1567 - 1815	August August; 33 (8): 1821 - 1976	September September; 33 (9): 1977 - 2207
October October; 33 (10): 2209 - 2536	November November; 33 (11): 2537 - 3058	December December; 33 (12): 3061 - 3345