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1980
January January; 212 (1): 1 - 181	February February; 212 (2): 183 - 359	March March; 212 (3): 361 - 590
April April; 213 (1): 1 - 203	May May; 213 (2): 205 - 424	June June; 213 (3): 425 - 631
July July; 214 (1): 1 - 230	August August; 214 (2): 231 - 453	September September; 214 (3): 455 - 736
October October; 215 (1): 1 - 278	November November; 215 (2): 279 - 543	December December; 215 (3): 545 - 722