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1971
January January; 49 (1): 1 - 186	February February; 49 (2): 191 - 372	March March; 49 (3): 2 - 554
May May; 50 (1): 1 - 182	June June; 50 (2): 187 - 360	July July; 50 (3): 3 - 546
September September; 51 (1): 1 - 226	October October; 51 (2): 2 - 414	November November; 51 (3): 417 - 610