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1981
February February 1981; 1 (2): 13 - 43	March Mar-Apr 1981; 1 (3): 10 - 61
May May-Jun 1981; 1 (4): 4 - 50	July Jul-Aug 1981; 1 (5): 4 - 54
September Sep-Oct 1981; 1 (6): 6 - 80	November Nov-Dec 1981; 1 (7): 9 - 66