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1989
January January; 5 (1): 1 - 11	February February; 5 (2): 1 - 17	March March; 5 (3): 1 - 17
April April; 5 (4): 1 - 15	May May; 5 (5): 1 - 17	June June; 5 (6): 1 - 17
July July; 5 (7): 1 - 16	August August; 5 (8): 1 - 12	September September; 5 (9): 1 - 15
October October; 5 (10): 1 - 13	November November; 5 (11): 1 - 21	December December; 5 (12): 1 - 23