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1957
January January; 49 (1): 1 - 58	February February; 49 (2): 59 - 108	March March; 49 (3): 109 - 166
April April; 49 (4): 167 - 223	May May; 49 (5): 225 - 282	June June; 49 (6): 283 - 340
July July; 49 (7): 341 - 392	August August; 49 (8): 407 - 464	September September; 49 (9): 465 - 522
October October; 49 (10): 523 - 568	November November; 49 (11): 569 - 610	December December; 49 (12): 611 - 683