1990
January January; 72-B (1): 2 - 157	March March; 72-B (2): 173 - 329
May May; 72-B (3): 345 - 526	July July; 72-B (4): 549 - 749
September September; 72-B (5): 754 - 929	November November; 72-B (6): 957 - 1080