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1980
January January; 21 (1): 1 - 144	February February; 21 (2): 149 - 261
March March; 21 (3): 269 - 385	May May; 21 (4): 391 - 500
July July; 21 (5): 505 - 650	August August; 21 (6): 657 - 783
September September; 21 (7): 789 - 955	November November; 21 (8): 961 - 1147