Information Processing Letters, Volume 69

Volume 69, Number 1, 15 January 1999

Volume 69, Number 2, 29 January 1999

Volume 69, Number 3, 12 February 1999

Volume 69, Number 4, 26 February 1999

Volume 69, Number 5, 12 March 1999

Volume 69, Number 6, 26 March 1999