Information Processing Letters, Volume 68

Volume 68, Number 1, 15 October 1998

Volume 68, Number 2, 30 October 1998

Volume 68, Number 3, 15 November 1998

Volume 68, Number 4, 30 November 1998

Volume 68, Number 5, 15 December 1998

Volume 68, Number 6, 30 December 1998