1950
January/February 1950; 12 (1): 1 - 70	March/April 1950; 12 (2): 71 - 140	May/June 1950; 12 (3): 141 - 214
July/August 1950; 12 (4): 215 - 276	September/October 1950; 12 (5): 277 - 342	November/December 1950; 12 (6): 343 - 416