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1999
January January; 514 (1): 1 - 302 January; 514 (2): 303 - 616	February February; 514 (3): 617 - 928 February; 515 (1): 1 - 314	March March; 515 (2): 315 - 628 March; 515 (3): 629 - 939
April April; 516 (1): 1 - 314 April; 516 (2): 0 - 627	May May; 516 (3): 629 - 938 May; 517 (1): 1 - 313	June June; 517 (2): 315 - 628 June; 517 (3): 629 - 939
July July; 518 (1): 1 - 314 July; 518 (2): 315 - 628	August August; 518 (3): 629 - 940 August; 519 (1): 1 - 314	September September; 519 (2): 315 - 628 September; 519 (3): 629 - 923
October October; 520 (1): 1 - 314 October; 520 (2): 315 - 628	November November; 520 (3): 629 - 940 November; 521 (1): 1 - 313	December December; 521 (2): 315 - 564 December; 521 (3): 565 - 761