1973
January January; 4 (1): 1 - 137	March March; 4 (2): 139 - 320	May May; 4 (3): 321 - 535
July July; 4 (4): 537 - 724	September September; 4 (5): 725 - 894	November November; 4 (6): 895 - 1078