1969
January/February 1969; 31 (1): 1 - 96	March/April 1969; 31 (2): 97 - 192	May/June 1969; 31 (3): 193 - 280
July/August 1969; 31 (4): 281 - 352	September/October 1969; 31 (5): 353 - 456	November/December 1969; 31 (6): 457 - 582