IB 20th TImeline

Events

April 4, 1968
July 20, 1969
August 15, 1969 - August 18, 1969
June 17, 1972
April 30, 1975
March 28, 1979
August 20, 1985
April 15, 1989
February 26, 1993
April 7, 1994