Information Processing Letters, Volume 37

Volume 37, Number 1, 10 January 1991

Volume 37, Number 2, 31 January 1991

Volume 37, Number 3, 18 February 1991

Volume 37, Number 4, 28 February 1991

Volume 37, Number 5, 14 March 1991

Volume 37, Number 6, 28 March 1991