1979
January January 1979 55 (1): 1 - 275	March March 1979 55 (2): 277 - 493
May May 1979 56 (1): 1 - 438	July July 1979 56 (2): 439 - 743
September September 1979 57 (1): 1 - 251	November November 1979 57 (2): 253 - 527