1972
January January 1; 30 (1): 1 - 147	February February 1; 30 (2): 149 - 256	March March 1; 30 (3): 257 - 366
April April 1; 30 (4): 367 - 504	May May 1; 30 (5): 505 - 620	June June 1; 30 (6): 621 - 761
July July 1; 31 (1): 1 - 128	August August 1; 31 (2): 129 - 292	September September 1; 31 (3): 293 - 472
October October 1; 31 (4): 473 - 635	November November 1; 31 (5): 637 - 816	December December 1; 31 (6): 817 - 988