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1971
January January; 11 (1): 1 - 76	March March; 11 (2): 77 - 160
May May; 11 (3): 161 - 244	July July; 11 (4): 245 - 320
September September; 11 (5): 321 - 396	November November; 11 (6): 397 - 462