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1971
January JANUARY/FEBRUARY ; 21 (1): 2 - 76	March MARCH/APRIL ; 21 (2): 78 - 140	May MAY/JUNE ; 21 (3): 142 - 212
July JULY/AUGUST ; 21 (4): 214 - 268	September SEPTEMBER/OCTOBER ; 21 (5): 270 - 340	November NOVEMBER/DECEMBER ; 21 (6): 342 - 406