Information Processing Letters, Volume 38

Volume 38, Number 1, 12 April 1991

Volume 38, Number 2, 26 April 1991

Volume 38, Number 3, 17 May 1991

Volume 38, Number 4, 31 May 1991

Volume 38, Number 5, 14 June 1991

Volume 38, Number 6, 28 June 1991