Information Processing Letters, Volume 33

Volume 33, Number 1, 27 October 1989

Volume 33, Number 2, 10 November 1989

Volume 33, Number 3, 30 November 1989

Volume 33, Number 4, 21 December 1989

Volume 33, Number 5, 10 January 1990

Volume 33, Number 6, 10 February 1990