1961
January January; 81 (1): 1 - 164	February February; 81 (2): 165 - 329	March March; 81 (3): 331 - 505
April April; 81 (4): 507 - 668	May May; 81 (5): 669 - 836	June June; 81 (6): 837 - 1011
July July; 82 (1): 1 - 157	August August; 82 (2): 159 - 317	September September; 82 (3): 319 - 459
October October; 82 (4): 461 - 622	November November; 82 (5): 623 - 791	December December; 82 (6): 793 - 996