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1981
January January; 122 (1): 1 - 170	February February; 122 (2): 171 - 366	March March; 123 (1): 1 - 196
April April; 123 (2): 197 - 386	May May; 124 (1): 1 - 228	June June; 124 (2): 229 - 442
July July; 125 (1): 1 - 220	August August; 125 (2): 221 - 467	September September; 126 (1): 1 - 252
October October; 126 (2): 253 - 523	November November; 127 (1): 1 - 222	December December; 127 (2): 223 - 428