1971
January January; 67 (1): 5 - 149	February February; 67 (2): 151 - 317	March March; 67 (3): 319 - 454
April April; 67 (4): 455 - 603	May May; 68 (1): 1 - 184	June June; 68 (2): 185 - 321
July July; 68 (3): 323 - 456	August August; 68 (4): 457 - 607	September September; 69 (1): 1 - 132
October October; 69 (2): 133 - 273	November November; 69 (3): 275 - 408	December December; 69 (4): 409 - 529