1981
January January; 34 (1): 1 - 88	February February; 34 (2): 89 - 168	March March; 34 (3): 169 - 248
April April; 34 (4): 249 - 339	May May; 34 (5): 343 - 434	June June; 34 (6): 435 - 532
July July; 34 (7): 533 - 632	August August; 34 (8): 633 - 730	September September; 34 (9): 731 - 818
October October; 34 (10): 819 - 915	November November; 34 (11): 917 - 1011	December December; 34 (12): 1013 - 1133