1987
January January; 18 (1): 2 - 275	March March; 18 (2): 311 - 538	May May; 18 (3): 541 - 687
July July; 18 (4): 689 - 815	September September; 18 (5): 817 - 963	November November; 18 (6): 985 - 1176